#1: As a newbie myself, I am not sure. I'd recommend reading Carol Deppe's book about breeding vegetables. I am almost done reading it and I think I may just re-read it immediately so it all sinks in! From what I gathered, traits are either dominant or recessive, so dominant will dominate no matter which parent it comes from. I think.
#2: Correct. The seeds you saved from F1 fruits are now filial generation two, (F2).
#3: Yes, F2+F2 (other) = a new hybrid, filial generation one (F1). And yes, F2+F1=F1 (though if backcrossing a F1 with an F2 of the same variety that might be different, I am not sure)
Edit: KC and I must have been typing simultaneously
