Hello LaRa k, this is honestly child's play.
Unfortunately, I don't have Office 2007 as I work with Libre Office. Anyway, I don't want to reinvent the wheel by writing about this.
But here are a few tips...
1. The easiest way to create a contents table is to use the built-in features of Word. But these feature (in my opinion) give you lesser control - and I'm not going explain that here :)
2. A good way to create a table of contents is to use a table. But this method (although gives you better control with editing and formatting) does NOT do the automated page numbering for you on the content page. So this is something you'll have to do your self.
3. As for renumbering the pages with Roman and Arabic numbers, just set the option to START RENUMBERING and change the numbering format. Here's a link
which I feel may be helpful to you.
I'm on a hectic schedule these days so I'm afraid I can't take the time to write a tutorial for you at this moment. I hope these tips help.