When i start driving my car keeps going into auto theft mode

When i select gears my car feels like it slams into the certain gear. And when i shift from park to reverse the car sometimes makes a really loud clunking noise. Could this be because of low fluid?

86,500 miles on her. I know there is also some suspension work that needs to be done but that's in the rear.

Whenever i shift from Park to Reverse or Drive i hear a clunking noise from the left rear wheel area. This noise also can be heard when moving from a stop and some times when driving. Whenever i go over bumps i don't hear it. Any ideas? Can it be axel damage?

Is it alternator?

I bought a new battery because I thought the car was dead. Put it in and the car actually started up. The security light was on and I noticed my headlights were on last night so I went and turned them off. The car had been unlocked so I think someone tried to steal it. Anyway when I went back out after changing the battery it wouldn't start and all of the power was on in the car. How do I fix this problem?

Has anyone experienced a titling to the right of the driver seat such that the top portion rubs against the side of the console as you move the driver seat backward or forward?