4.) Is there anything else I need to install XNA? You will need to have Microsoft Visual C# 2008 Express Edition installed because XNA is an addon to it.
5.) I have installed XNA but I dont see where to run it? You will need to open up Microsoft Visual C# 2008 Express Edition in order to create a new game. Once it is open when you go to create a new project you will see the option to create a windows game, 360 game, or a zune game.
I will be adding more to this as I get time but that is the basics for now. If anyone has any additions to this please let me know(feel free to pm me) and I will gladly add them.