Welcome to FRC!
When our team was new we encountered similar issues to what you are experiencing. Therefore, the past year, one of our members (now Alumni) worked very hard on creating a video tutorial series explaining the FRC electronics system. We have a CD thread for it here:
http://www.chiefdelphi.com/forums/sh...d.php?t=110324
(or the link in my sig)
Best of luck!