if I am not mistaken then the page numbering starts with the first page containing content.
Be careful and do not mix the number of pages of the document with the page numbering inside the document.
Imagine a report having a cover page and a table of content followed by two headers each containing some content. Then the page containing the first header would be numbered 1. For that reason the toc points to the page 1.
all page numbers in the table of content showing as "1" is is due to a bug in MS Word. It does not update the document's fields automatically. If you open the print preview (or manually update the text fields) all page numbers in the table of content have the correct value.