Is my rotor/stator configuration correct?
Question 1

The magnet arrangement is ok. Rather than wind the coils differently, it may be easier to wind them the same and connect them as required to make the outputs additive rather than opposing each other.

Question 2

Since the number of coils is not evenly divisible by three, the coils must be connected to make a single-phase generator. Perhaps it could be connected as a two=phase generator, but that would be more complicated and I think not advantageous. An 8-pole, single-phase generator is probably best.

Question 3

Frequency (Hz) = RPM X Number of Poles / 120

Additional Advice

You should consider the magnetic circuit and the variation of the air gap. The diagram should show the iron.