A table of contents lists each heading and sub-heading used in your paper.
Headings are flush left (chapter headings)
Sub-headings are indented once
Sub sub-headings are indented twice
The page number where each item can be found is flush right (on the right margin).
The attached document details how to manually create dot leader tabs (the dot leader puts the ............. in your TOC).
You can use dot leader tabs in a manually created TOC or a TOC created using the automatic features in MS Word.