So as I said in the title that's what I want to achieve. To better explain what I want to do, here's a picture:

I added the extra "contents" below the one I want to delete using:
Code: Select all
\addcontentsline{toc}{section}{Contents}
and now I have awkward two "contents" and that's why I want to delete the upper one.
By the way, I also want to have dots after "Contents" and after "1 Introduction", how can I do it?
I tried using tocloft package but it not necessarily works well with article class document and can't get it to work, any other propositions?