2018 Toyota RAV4 brakes problems

While in reverse with foot on brake (stopped) the vehicle was rear ended. While foot still on brake the vehicle had uncommanded forward acceleration (engine revved up like foot floored the gas pedal). Vehicle accelerated forward ~25 ft and hit the front of another vehicle (foot on brake pedal entire time). Upon impact, the vehicle had uncommanded acceleration in reverse (foot on brake pedal still). Was able to turn of ignition and pull the emergency brake to stop the vehicle after moving ~25ft in reverse.

Starting late aug2020 the dashboard starting to show warning lights randomly and inconsistently. All warning lights do not come at the same time but when turning the external lights on other warning lights turn on and so far the car have stalled more than 4 times while driving under 40 MPH. The last 3 times the car started right after being parked and but this last time it did not and while I was waiting for a tow almost had an accident from behind me as the car that was coming behind me stopped and was hit by…