Wordpress/Buddypress Noob baffled by multi-page posts

I'm a noobie Wordpress/Buddypress user, migrating from Blogger.

I have a few multi-page posts in Blogger that I'm trying to replicate on WP/BP. How do I accomplish multiple page posts?

- Is there some sort of HTML, are there requirements that separate post-pages are separate files?
- How do I avoid each page of the post showing as a separate archive post?
- How do I avoid each page of the post showing as a separate post in my RSS feed (feedburner)?

Thanks in advance for your help!