1) An "idiots" guide which is based on Simplymepis is "Point and Click Linux!" by Robin "Roblimo" Miller.
Click on the "K-Gear" icon on the extreme left of you panel
Click on "Print System" about 6 entries up
Click on "Add Printer"
This brings up the "Add Printer Wizard"
NB Printing from the LiveCD as opposed to an installation to the Hard Disk probably won't work.
(Paper size in set as "Letter" here in the UK this has to be changed to A4)
2) You don't indicate which version of Ubuntu you downloaded - breezy or dapper. One of the first things to do is install EITHER Automatix or Easyubuntu. These are scripts which download a bunch of useful stuff. For dapper I recommend http://krazypenguin.net/Ubuntu_Dapper_Drake_6.06_Guide
this includes instructions about setting up an ATI card.
The Ubuntu Forum at http://www.ubuntuforums.org/forumdisplay.php?f=73
is a very busy and friendly place to go.