1) how much does insurance normally cost for one?
Depends on the company. Depends on what kind of bike, your age, married or not, if you took the MSF, etc. Personally I got hooked up with State Farm (best provider for bikes) and am only paying $46/mo for full coverage.

2) would it be more if I financed it?
Yes. Better to buy it outright than to finance. I was impatient and sort of bought mine on impulse and am paying out the ass for it, but there are no regrets.

3) what doI have to do to get a motorcycle license?
One of two choices:
a) Learn by yourself and take the DMV riding test in their parking lot
b) Pass the MSF course and take a written test at the DMV