you are not expecting a car, regardless it's heavy or light, can move fast or climb a mountain without pressing fuel pedal. Otherwise, either the idle is too high, or the engine is too big while the car is too small/light.
now if the car doesn't move at all, that is not your car, it could be an indication of impaired movement, such as brake stuck or transmission failure...
now if the car doesn't move at all, that is not your car, it could be an indication of impaired movement, such as brake stuck or transmission failure...