Q:

In Oracle, how do you use two different functions on the same column? 

I am trying to use two different string functions (initcap and trim) on one column and I would like it to display only the one column with both functions applied.   In general how do you use two or more functions on a single column? 

A:

In general, you can nest function calls within function calls, evaluated innermost to outermost:
SELECT INITCAP(TRIM(column)) FROM your_table;

As long as each nested function returns a value of a compatible type, you should be able to apply this to any functions. 
For example:
SELECT '|' || INITCAP(TRIM('  abc def ghi  jklmn   ')) || '|' str
  FROM dual;

Results in:
STR
--------------------
|Abc Def Ghi  Jklmn|

Note I concatenated the pipe symbol to illustrate the TRIM of the string. 
More to the point here:
SELECT '|' || INITCAP(TRIM('.'  FROM '... abc def ghi  jklmn...')) || '|' str FROM dual;

Gives me:
STR
----------------------
| Abc Def Ghi  Jklmn|

