Wiring in a hot tub with a 220V/50Amp 4 wire system setup. Need advise on what type of wire to use, currently looking at 8-3. Also want to hear suggestions on what type of breaker I should have.

Well the breaker can be either a 240V 50 amp breaker or a 240V 50 Amp GFCI breaker.

For 50 amp, you will need #6 AWG four wire cable.

A hot tub is not a place for someone with little experience to do wiring.
You are asking very basic questions here. What is your experience with wiring?

you "must" install in accordance with the manufacturer's installation instructions...
this is required by the code. Read the instructions first, then ask questions.