Cheap toy store ones around $10 up to hardcore hobbyist models that run on gasoline- $1000+
The gas station. Just make sure to make the proper oil to gas ratio at home.
it ranges between cars, my car can hold about 16 gallons of gas.
you don't use gas you use nitro methane The actual gas is called Nitro methane. 20% nitro fuel is a good all around fuel for nitro powered rc cars
As of 4/1/08 Regular 87 Octane is selling for $3.15 in Western Kentucky.