A newbie to drupal met some difficulties to make a big social website

Hello, there

I m a newbie to drupal. Now i m doing my first drupal project and I met some difficulties. So I m here to looking for help.

My project is to make a kinda big social website which can put on some news for registered members sometimes. For the news announcement part, I have already used many modules and it is pretty much done. But since I began to do the member registering and social work (similar to facebook and twitter) part this week, it was hard to start. I used profile 2 module and some other related modules to do different registering pages in accordance to different roles. For example, if someone registers on the page A, then he/she automatically becomes role A. Likewise, if someone registers on the page B, then he/she automatically becomes role B.

Now, the problem is that all the information register is been saved in data base, but I don't know how to put the information out onto a single page? Is there any module can do such thing? Or any php code way I can use to solve this?

*ex:*
If I want to put all the information about members who register as role A onto one page, how can I do to take all this information out? *(there is not including profile type when adding content in view)*

One more thing, like this drupal website http://www.popsugar.com/
How to make the register module like this (register step by step, as soon as finish the first step it automatically jumps into the second page for other information)?
Then when it s finished, how to take the completed register information from data base?
http://www.popsugar.com/community/groups
and how to combine groups and register part together?

Sorry about my poor English. Thank you all.