Q:

Create a numeric navigation

How do I create a menu which automatecaly names the involved page into a numeric navigation? 
This would be my page tree:
News
|--- Newsarticle tom (contains 9 content elements)
|--- Skeet's stuff (contains 9 content elements)
|--- Jessicas 5 articles (contains 4 content elements)
In the frontent all 3 pages will be simply displayed as a numeric navi:

(Imagin the 9 textpic elements of "Newsarticle tom" in here)

1 - 2 - 3

A:

{register:count_HMENU_MENUOBJ} should do the trick - I found it in the comments here http://www.typo3wizard.com/de/snippets/menus/nummeriertes-menue.html. ( german)
Here I used @konsolenfreddies HMENU example, modified for your demands. ( Untested). 
temp.menu = HMENU
temp.menu {
    1 = TMENU
    1 {
        noBlur = 1
        wrap = <ul>|</ul>
        NO = 1
        NO {
            wrapItemAndSub = <li>|</li>
            altText = subtitle // title
            title = subtitle // title
        }
        CUR < .NO
        CUR.wrapItemAndSub = <li class="active">|</li>
        ACT < .CUR
    }

    2 < .1
    2 {
        wrap = <ol>|</ol>
        NO {
            allWrap = <span>Nr.{register:count_HMENU_MENUOBJ}|</span>
            allWrap.insertData = 1
            ATagBeforeWrap = 1
            }
        CUR < .NO
        CUR.wrapItemAndSub = <li class="active"><span>|</span></li>
        ACT < .CUR
    }
}

In this case, I guess all subpages are taken in account when numbering.  And the full setup as described on the site is far more complicated.  But if you know your typoscript, you'll understand. 