Welcome to RollaClub!
First of all 4x114.3 PCD is the stud pattern of your KE35.
For future reference the standard stud patterns of all Corolla's IS:
KE1x, KE2x = 4x110 PCD
KE3x, KE5x, KE70, AE71, AE85, AE86 = 4x114.3 PCD
All front wheel drive Corolla's 4x100 PCD!
I'm not sure what's the widest you can fit on front and rear, but check out peoples threads and you'll probably find out the largest
people go. I think 8 would be the widest you'd WANT to go without pumping your guards.
As for future questions such as these (ones that could be answered VERY simply) it is best to do a search for it as it'll only take you
a couple minutes - if not seconds - to find your answer. Otherwise we'll have lots of 1 liners cluttering up the forums!
Cheers,
Seabiscuit!