Document:

<PAGE>

                                                                     Exhibit 4.8

                       AMENDMENT NO. 2 TO CREDIT AGREEMENT

     This Amendment No. 2 to Credit Agreement (this "Amendment") is entered into
as of October 16, 1998 by and among Midas, Inc. and Midas International
Corporation (together, the "Borrowers" and each, a "Borrower"), the undersigned
Lenders, The First National Bank of Chicago, as administrative agent
("Administrative Agent"), and Credit Suisse First Boston, as co-agent (the
"Co-Agent").

                                    RECITALS

     A. The Borrowers, the lenders party thereto (the "Lenders"), the
Administrative Agent and the Co-Agent are party to that certain Credit Agreement
dated as of January 22, 1998 (as amended as of April 3, 1998, the "Credit
Agreement"). Unless otherwise specified herein, capitalized terms used in this
Amendment shall have the meanings ascribed to them by the Credit Agreement.

     B. The Borrowers, the Administrative Agent, the Co-Agent and the
undersigned Lenders wish to amend the Credit Agreement and waive certain
provisions thereof on the terms and conditions set forth below.

     Now, therefore, in consideration of the mutual execution hereof and other
good and valuable consideration, the parties hereto agree as follows:

        1. Waiver. The Lenders hereby waive any breach of Section 6.12(c)
           ------                                         ---------------
arising solely from the sale by Midas and its Subsidiaries of European
operations with an aggregate book value in excess of $50,000,000.

        2. Amendment to Credit Agreement. Article VI of the Credit Agreement is
           ------------------------------
hereby amended by deleting clause (c) of Section 6.12 in its entirety and
                                         ------------
replacing it with the following:

            (c)   sales made after the Closing Date of (i) Midas-operated stores
                  in the United States, (ii) the caliper rebuilding plant
                  located in Chicago, Illinois and (iii) the facility located in
                  Scarborough, Ontario, so long as all such sales involve
                  Property with an aggregate net book value not to exceed
                  $35,000,000.

        3. Representations and Warranties of the Borrowers. Each Borrower
           -----------------------------------------------
represents and warrants that:

            (a) The execution, delivery and performance by such Borrower of this
        Amendment have been duly authorized by all necessary corporate action
        and that this Amendment is a legal, valid and binding obligation of such
        Borrower enforceable against such Borrower in accordance with its terms,
        except as the enforcement thereof may be subject to (i) the effect of
        any applicable bankruptcy, insolvency, reorganization, moratorium or
        similar law affecting creditors' rights generally and (ii) general
        principles

<PAGE>

of equity (regardless of whether such enforcement is sought in a proceeding in
equity or at law);

            (b) Each of the representations and warranties contained in the
        Credit Agreement is true and correct in all material respects on and as
        of the date hereof as if made on the date hereof, except to the extent
        that any such representation or warranty is stated to relate solely to
        an earlier date, in which case such representation or warranty shall be
        true and correct on and as of such earlier date; and

            (c) After giving effect to this Amendment, no Default or Unmatured
        Default has occurred and is continuing.

        4. Effective Date. This Amendment shall become effective upon the
           --------------
execution and delivery hereof by the Borrowers, the Administrative Agent and the
Required Lenders (without respect to whether it has been executed and delivered
by all the Lenders).

        5. Reference to and Effect Upon the Credit Agreement.
           -------------------------------------------------

                (a) Except as specifically amended or waived above, the Credit
        Agreement and the other Loan Documents shall remain in full force and
        effect and are hereby ratified and confirmed.

                (b) The execution, delivery and effectiveness of this Amendment
        shall not operate as a waiver of any right, power or remedy of the
        Administrative Agent or any Lender under the Credit Agreement or any
        Loan Document, nor constitute a waiver of any provision of the Credit
        Agreement or any Loan Document, except as specifically set forth herein.
        Upon the effectiveness of this Amendment, each reference in the Credit
        Agreement to "this Agreement", "hereunder", "hereof", "herein" or words
        of similar import shall mean and be a reference to the Credit Agreement
        as amended hereby.

        6. Costs and Expenses. The Borrowers hereby affirm their joint and
           ------------------
several obligation under Section 9.6 of the Credit Agreement to reimburse the
Administrative Agent for all reasonable costs, internal charges and
out-of-pocket expenses paid or incurred by the Administrative Agent in
connection with the preparation, negotiation, execution and delivery of this
Amendment, including but not limited to the attorneys' fees and time charges of
attorneys for the Administrative Agent with respect thereto.

        7. GOVERNING LAW. THIS AMENDMENT SHALL BE GOVERNED BY AND CONSTRUED IN
           -------------
ACCORDANCE WITH THE INTERNAL LAWS (AND NOT THE LAW OF CONFLICTS) OF THE STATE OF
ILLINOIS BUT GIVING EFFECT TO FEDERAL LAWS APPLICABLE TO NATIONAL BANKS.

        8. Headings. Section headings in this Amendment are included herein for
           --------
convenience of reference only and shall not constitute a part of this Amendment
for any other purposes.

                                     - 2 -

<PAGE>

        9. Counterparts. This Amendment may be executed in any number of
           ------------
counterparts, each of which when so executed shall be deemed an original but all
such counterparts shall constitute one and the same instrument.

        10. Reaffirmation of Guaranty. Each of Midas and International hereby
            -------------------------
reaffirms its obligations under Article XIII and Article XIV, respectively, of
the Credit Agreement.

                            [signature pages follow]

                                     - 3 -

<PAGE>

     IN WITNESS WHEREOF, the parties have executed this Amendment as of the date
and year first above written.

                                      MIDAS, INC.

                                            By:
                                               ------------------------

                                            Its:
                                                -----------------------

                                      MIDAS INTERNATIONAL CORPORATION

                                            By:
                                               ------------------------

                                            Its:
                                                -----------------------

                                      THE FIRST NATIONAL BANK OF CHICAGO,
                                      individually and as Administrative Agent

                                            By:
                                               ------------------------

                                            Its:
                                                -----------------------

                                      CREDIT SUISSE FIRST BOSTON,
                                      individually and as Co-Agent

                                            By:
                                               ------------------------

                                            Its:
                                                -----------------------

                                     - 4 -

<PAGE>

                                      ABN AMRO BANK B.V.

                                            By:
                                               ------------------------

                                            Its:
                                                -----------------------

                                      BANQUE NATIONALE DE PARIS - CHICAGO

                                            By:
                                               ------------------------

                                            Its:
                                                -----------------------

                                      THE FUJI BANK, LIMITED

                                            By:
                                               ------------------------

                                            Its:
                                                -----------------------

                                      THE NORTHERN TRUST COMPANY

                                            By:
                                               ------------------------

                                            Its:
                                                -----------------------

                                      MERCANTILE BANK NATIONAL ASSOCIATION

                                            By:
                                               ------------------------

                                            Its:
                                                -----------------------

                                     - 5 -<PAGE>
                                                                     Exhibit 4.9

                       AMENDMENT NO. 3 TO CREDIT AGREEMENT
                       -----------------------------------

     This Amendment No. 3 to Credit Agreement (this "Amendment") is entered into
as of February 8, 1999 by and among Midas, Inc. and Midas International
Corporation (together, the "Borrowers" and each, a "Borrower"), the undersigned
Lenders, The First National Bank of Chicago, as administrative agent
("Administrative Agent"), and Credit Suisse First Boston, as co-agent (the
"Co-Agent").

                                    RECITALS

     A. The Borrowers, the lenders party thereto (the "Lenders"), the
Administrative Agent and the Co-Agent are party to that certain Credit Agreement
dated as of January 22, 1998 (as amended as of April 3, 1998 and October 16,
1998, the "Credit Agreement"). Unless otherwise specified herein, capitalized
terms used in this Amendment shall have the meanings ascribed to them by the
Credit Agreement.

     B. The Borrowers, the Administrative Agent, the Co-Agent and the
undersigned Lenders wish to further amend the Credit Agreement on the terms and
conditions set forth below.

     Now, therefore, in consideration of the mutual execution hereof and other
good and valuable consideration, the parties hereto agree as follows:

        1. Amendment to Credit Agreement. Article VI of the Credit Agreement is
           -----------------------------
hereby amended by adding the following to the end of Section 6.18.1:

        , less (e) the aggregate consideration paid by Midas to repurchase or
        redeem its capital stock after December 26, 1998, in an amount not to
        exceed $34 million; provided, that, at the time of determination, the
        number of shares repurchased or redeemed is less than or equal to the
        number of shares in respect of which employees, officers and directors
        of Midas have exercised stock options after such date

        2. Representations and Warranties of the Borrowers. Each Borrower
           -----------------------------------------------
represents and warrants that:

                (a) The execution, delivery and performance by such Borrower of
        this Amendment have been duly authorized by all necessary corporate
        action and that this Amendment is a legal, valid and binding obligation
        of such Borrower enforceable against such Borrower in accordance with
        its terms, except as the enforcement thereof may be subject to (i) the
        effect of any applicable bankruptcy, insolvency, reorganization,
        moratorium or similar law affecting creditors' rights generally and (ii)
        general principles of equity (regardless of whether such enforcement is
        sought in a proceeding in equity or at law);

                (b) Each of the representations and warranties contained in the
        Credit Agreement is true and correct in all material respects on and as
        of the date hereof as if made on the date hereof, except to the extent
        that any such representation or warranty is

<PAGE>

        stated to relate solely to an earlier date, in which case such
        representation or warranty shall be true and correct on and as of such
        earlier date; and

                (c) After giving effect to this Amendment, no Default or
        Unmatured Default has occurred and is continuing.

        3. Effective Date. This Amendment shall become effective upon the
           --------------
execution and delivery hereof by the Borrowers, the Administrative Agent and the
Required Lenders (without respect to whether it has been executed and delivered
by all the Lenders).

        4. Reference to and Effect Upon the Credit Agreement.
           --------------------------------------------------

                (a) Except as specifically amended above, the Credit Agreement
        and the other Loan Documents shall remain in full force and effect and
        are hereby ratified and confirmed.

                (b) The execution, delivery and effectiveness of this Amendment
        shall not operate as a waiver of any right, power or remedy of the
        Administrative Agent or any Lender under the Credit Agreement or any
        Loan Document, nor constitute a waiver of any provision of the Credit
        Agreement or any Loan Document. Upon the effectiveness of this
        Amendment, each reference in the Credit Agreement to "this Agreement",
        "hereunder", "hereof", "herein" or words of similar import shall mean
        and be a reference to the Credit Agreement as amended hereby.

        5. Costs and Expenses. The Borrowers hereby affirm their joint and
           ------------------
several obligation under Section 9.6 of the Credit Agreement to reimburse the
Administrative Agent for all reasonable costs, internal charges and
out-of-pocket expenses paid or incurred by the Administrative Agent in
connection with the preparation, negotiation, execution and delivery of this
Amendment, including but not limited to the attorneys' fees and time charges of
attorneys for the Administrative Agent with respect thereto.

        6. GOVERNING LAW. THIS AMENDMENT SHALL BE GOVERNED BY AND CONSTRUED IN
           -------------
ACCORDANCE WITH THE INTERNAL LAWS (AND NOT THE LAW OF CONFLICTS) OF THE STATE OF
ILLINOIS BUT GIVING EFFECT TO FEDERAL LAWS APPLICABLE TO NATIONAL BANKS.

        7. Headings. Section headings in this Amendment are included herein for
           --------
convenience of reference only and shall not constitute a part of this Amendment
for any other purposes.

        8. Counterparts. This Amendment may be executed in any number of
           ------------
counterparts, each of which when so executed shall be deemed an original but all
such counterparts shall constitute one and the same instrument.

        9. Reaffirmation of Guaranty. Each of Midas and International hereby
           -------------------------
reaffirms its obligations under Article XIII and Article XIV, respectively, of
the Credit Agreement.

                                      - 2 -

<PAGE>

                            [signature pages follow]

                                     - 3 -

<PAGE>

     IN WITNESS WHEREOF, the parties have executed this Amendment as of the date
and year first above written.

                                MIDAS, INC.

                                        By:
                                           ------------------------

                                        Its:
                                            -----------------------

                                MIDAS INTERNATIONAL CORPORATION

                                        By:
                                           ------------------------

                                        Its:
                                            -----------------------

                                THE FIRST NATIONAL BANK OF CHICAGO,
                                individually and as Administrative Agent

                                        By:
                                           ------------------------

                                        Its:
                                            -----------------------

                                CREDIT SUISSE FIRST BOSTON,
                                individually and as Co-Agent

                                        By:
                                           ------------------------

                                        Its:
                                            -----------------------

                                     - 4 -

<PAGE>

                                ABN AMRO BANK B.V.

                                        By:
                                           ------------------------

                                        Its:
                                            -----------------------

                                BANQUE NATIONALE DE PARIS - CHICAGO

                                        By:
                                           ------------------------

                                        Its:
                                            -----------------------

                                THE FUJI BANK, LIMITED

                                        By:
                                           ------------------------

                                        Its:
                                            -----------------------

                                THE NORTHERN TRUST COMPANY

                                        By:
                                           ------------------------

                                        Its:
                                            -----------------------

                                MERCANTILE BANK NATIONAL ASSOCIATION

                                        By:
                                           ------------------------

                                        Its:
                                            -----------------------

                                     - 5 -

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