XF 1.1 Change somethings


I have to make some changes in my forum template and I wonder if it is possible or if there is a component to do that.

1. Add more fields in "Registration Page"?
2. Add more fields in "Create Thread" page?
3. Edit this box: http://i.imgur.com/LvWMxxV.png, adding more informations that I want to get in database?

Thank you