Bmw Parking Brake Conventional Mechanical

my head lights will not turn on neither will the high beams. when i try to turn them on the parking lights turn on. and some times the horn doesn't work. what would cause this?

Pulling into parking space with foot on brake care accelerated went over a concrete bumper and didn't stop until it hit a building.  I was scared out of my life and afraid to drive this car again.  It is a 2001 BMW 325ci.

Car will occasionally "rock" back and forth as the idle jumps up and down when putting into reverse and backing and turning out of a parking spot. This is very annoying and dangerous. It has happened to us 3 times and we've had the car a month.

2003 325i, while parking and driving to line up with parking spot, car accelerated and hit wall 2 feet away. Car totaled. I am 100% sure I was stepping on brake pedal when car took off and slammed in to wall. Has any one else have any similar issu