More infos in user profile! – some doubts

I’m customizing the user profile page and would like it to be shown some information of each user, such as:

1 – Total Number of Comments on the site;
2 – Show the last 5 comments;
3 – Date of last access;
4 – Date of Registration on the site;
5 – Navigator and / or operating system;
6 – Latest posts visited.

I’m looking for how to do this, but have not found anything yet. If you can help me, thank you! : D

Sry my english ):