At this point right now, I know it might hurt u and I apologize but this is what I can say is forget your dream about getting a 5D Mark II or a 1D Mark 3/4 and instead get a real nice FF glass first before upgrading to a FF camera, get a 17-40 f/4.0 first or something and learn more about photography, your camera and the different kind of lenses and only then in a couple of years time upgrade to a FF (after you have a couple of FF lens and you feel the need of a FF camera)
Cause even if you have a 5D or even a 1D, I honestly feel that it will be too overwhelming for you cause judging by your questions, it seems you don't really understand a lot of things and getting a 5D or 1D will confuse you even more.
I got a friend who owns a D40 and her dad owns a D300s, she played a bit with the D300s and felt it was too overwhelming for her and ended up prefer the D40 for now.
Cause even if you have a 5D or even a 1D, I honestly feel that it will be too overwhelming for you cause judging by your questions, it seems you don't really understand a lot of things and getting a 5D or 1D will confuse you even more.
I got a friend who owns a D40 and her dad owns a D300s, she played a bit with the D300s and felt it was too overwhelming for her and ended up prefer the D40 for now.