A family of Microsoft word processing software products for creating web, email, and print documents.
What you are describing may indicate that too many paragraphs in the document are formatted in heading styles. You can (re-)apply Normal style to affected paragraphs.
However, a default TOC also includes text paragraphs that have been inadvertently formatted with an Outline Level different from "Body Text" (Paragraph dialog box). To quickly omit such paragraphs, edit the TOC field code and remove the \u switch and then update the TOC.
Do the following: Press Alt+F9 (or Alt+Fn+F9 on some keyboards). You will see something like { TOC \o "1-3" \h \u } in place of the table of contents. Delete the \u part and update the TOC with F9 (or Fn+F9). If prompted, choose to update the whole table of contents. Press Alt+F9 (Alt+Fn+F9) again to hide field codes.