Car was purchased 1 hour prior to incident from a dealership. Car was in idle and was shifted to drive and automatically accelerated rapidly without foot on gas pedal and breaks did not work when breaks were forcefully applied during the incident. The car crashed into a house deck and went off the cement pad and crashed into trees in the yard. Unable to remove key from ignition, had to be placed in neutral to remove key. We had the car for less than an hour after purchase. Damage was sustained to the deck and significant damage to car, air bags did not deploy. Claim was immediately filed with insurance.