You will need between a 50-60 amp breaker and GFCI to install a hot tub. It is also important to note that it should be on a dedicated breaker.
This means that no other power sources use the breaker. This includes things like appliances, lights, or any other power source.
Connecting a few wires and installing a conduit will get your hot tub up and running in no time. If you're not comfortable installing hot tub wiring yourself or are unsure about the logistics, it may be a good idea to contact a licensed electrician. Installing the wiring wrong can be very dangerous. Evaluate your hot tub and its location and determine the best installation.