First, you'd have to create a set of heading Styles to use in your 'un-numbered' Section. You'd make these look the same as the Styles you're now using.
Then you'd replace the Styles you're now using in your 'un-numbered' Section with their new couterparts.
Finally, insert a new TOC that refers only to those Styles and configure the TOC to not display page numbers.

Exactly why you'd want a TOC that displays page numbers for some pages but not others beats me (how are users supposed to know beforehand where those items are located?), but it's your document.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]