Whats causing it to not turn on all the way but not want to turn off? And it wont come out of neutral

What is your question?

When you try and turn the car on its louder than its supposed to be. It will turn on all the way to the point where the gears on the gear shift turn on on the gas but won't come out of neutral when it has jumper cables on it but when you take them off it goes back to not turning on all the way. Then it will not turn off or let you take key out until the car dies. It also says something about the transmittion parking mechanism and that the car has to be on a flat serface.