you would need to push it or pull it.
cart+steam engine
Cart and combustion engine makes car
tool + wood= wheel, wheel + wood = cart, cart + combustion engine= car if you don't have combustion engine it's boiler+coal= steam engine, steam engine + gasoline = combustion engine.
cart + combustion engine = car steam engine + gasoline = combustion engine boiler + coal = steam engine
put in a faster engine
nitrous and a bigger engine
That would be illegal. You would have to make your own account.
This is difficult to answer without knowing the make of the car or engine but an average engine would cost upwards of $300 but for an antique engine you may need to go to a specialized dealer.
Only if you make it from materials that float, but then it wouldn't be a go cart, but a float cart. It wouldn't be heavy enough to stay on the road as a go cart.
wheel+wood=cart
wheel + wood = cart
wheel+wood=cart