Space above page border and background color

Greetings:

This is my first site using ATH and I want to say it's an AMAZING theme! So thanks.

The site I'm working on: www.tbgdm.com

My three questions so far:

1) How can I add space above and below the page border so the border is not touching the edge of the frame?

2) How can I add a background color behind the border (but keeping the area inside the border white) that will fill to the edge of the screen.

3) How can I change the default bullets?

THANKS!
S.