Car Accelerates On Its Own problems of the 2001 Toyota Tundra

Unintended acceleration while backing up out of a parking space on my mother's 2001 Toyota Tundra limited. The truck hit two parked vehicles in the parking lot. As a passenger I reached over to try to put the truck in neutral but that wasn't working so I turned off the ignition and we stopped. The second vehicle we hit, a Ford expedition was forcefully moved over to the next parking spot due to the crash. 911 was called, fire dept and ambulance arrived but police did not show up due to their lack of staff and no injury/death.

When driving in wet weather conditions at 40 mph, consumer was attempting to avoid a flooded area, when the consumer suddenly lost control of vehicle, upon impact of hitting an end post, the driver and passenger side air bags failed to deploy, driver sustained head and chest injuries. Consumer stated when trying to get over to avoid the flood, the vehicle rapidly accelerated on its own, consumer believes the cause of failure may have been the 2 tires on the passenger side may have come off the rims, causing loss of control of vehicle. Tire information (b. F. Goodrich p265/70r16).