A family of Microsoft word processing software products for creating web, email, and print documents.
Which version of Word are you running?
If this is the full version running under Windows or MacOS, you get hyperlinked TOC entries by default, which should make navigating to headings from a TOC straightforward.
You can add a STYLEREF field to repeat the text of a chapter heading in the document header or footer. This is helpful for navigation and it is unrelated to the table of contents.
Alignment in the TOC may be affected by formatting in the headings themselves. For example, if paragraph numbering is applied to text, Word adds a tab stop following the paragraph number, which sometimes causes undesired effects.
You can upload a screen shot for illustration, so that we can have a closer look.