2006 Toyota Highlander Hybrid stability control problems

My wife was parked in front of our apartment building, idling with her foot on the brake, when our 2006 toyota highlander hybrid suddenly accelerated and crashed into a gate. Before the car crashed, she repeatedly applied the brake and even put the car in park. The car did not stop. After the impact, the engine continued to rev and accelerate before finally stopping. This had never happened before. The body has been repaired, but per toyota, nothing mechanical or electronic has been touched.

Most of dashboard lights went on and brakes failed to engage when 17 y/o son driving vehicle as pulling into parking spot. Able to use emergency brake as in parking lot and stop the vehicle. Took to toyota and told actuator needed to be replaced to cost of about $2400. This occurred on 01/09/2018. We found out after the fact the extended warranty on this expired on 12/31/2017 just 9 days before our son had this incident.