50 amp breaker wired with AWG # 6 wire.
a 30 amp breaker will work. the formula is power divided by voltage and then use next size up
running wire 12-2 300ft w/9ea. 27watt lights what size breaker should be used
that would really depend upon the stove (I assume that you mean an appliance with an electric cooktop and an electric oven) and the size of the wire present. Most of the time a stove will require a 50amp breaker. This will mean that you would need to have 6 gauge wiring. You can probably get by with a 40 amp breaker and 8 gauge wire if you absolutely had to. Always check the appliance specifications. they will recommend a breaker size.
30 amp breaker with #10 gauge copper wire
The size breaker you use is determined by the size wire used in the circuit. If you use AWG #12/2 wire then use a 20 amp breaker. If you use AWG # 14/2 then use a 15 amp breaker.
Minimally 30 AMPS
The correct wire size for a 15 amp breaker is a #14 wire.
For a standard fridge, a dedicated single pole 15 or 20 amp breaker will do the job.
A 15 amp dedicated circuit breaker should be used for the dishwasher. The disposal can be wired to the general kitchen 15 amp circuit.