HTML Meta Tags - Robots "index, nofollow"?

I'm currently building a website, that has an iframe in the middle of my index.html, in which all the other pages are shown (e.g. home.html and so on).

Now I have concerns... I don't want that search engines open the eg home.html directly, I want them just to index the main page (the index.html with the iframe on it).
So I guess I put the Meta Tag Robots "index, nofollow" on the index.html, while all my other pages get "noindex, nofollow".
Right?

But doesn't that minimize my chances to get a proper page rank? Because on my index.html there ain't too many words or anything...

The page rank is mostly beside the point - the content of your pages will be hidden from the search engine, the only content that will be indexed will be the navigation.

Basically - don't use frames for this. They are not at all suited to it.

Use includes (server side or preprocessed) to include the navigation on each page instead.

you can try using page redirects.