Welcome to JustAnswer, my name is XXXXX XXXXX X'm here to help get your problem resolved. Ask follow up questions, thanks.
It sounds like brake light switch may have failed which is located at top of pedal. You can disconnect switch and jump wires together to see if lights come on, if so replace switch.
It wont go into gear because the shift interlock solenoid isnt working..Now that you mention obd tester not working, triple check all of your fuses.