Customizing Membership 2 pages and buttons

I have a few questions:

1. How can I customize the look of the Account, Registration and Member Pages. Right now everything is gigantic and really squished.

2. Am I am able to hyperlink the amount in this table ( to be the signup buttons? Where do I find the proper URL?

3. I want to show the logged in user name in the secondary menu in the top-right when the user is logged in

4. I would like to customize the order of the Membership types. Right now they are in alphabetical order