When I tried to start my 2006 Prius ,it wouldn't start and this message appears with the red triangle "there is a problem with the transmission "p" lock mechanism.Park your car on a flat surface and fully apply the parking break. " It is at a parking lot now because I couldn't start it! Is it the battery? Looks like I would need to have it towed or is there anyway I can start it and drive it to the dealership to get it checked out. HELP...HELP..HELP....!!!!!!