Car has multiple problems, keys stuck, and now I can put the shifter in gear without brake, this all started when my mother had the car & gave it to me, I have changed 3 alts, and starters 2 batteries and still can't drive the vehicle

This is a great car. Totally love it. It has 1800 miles on it/ 2005 purchased/ but now over 138000 on it. I want to see it turn over one more time to hit 200k. All highway miles. Handle well on the highway. Headlights are not the greatest. It stopped on me driving at 60 mph which was not good. Power steering is getting bad. Outside paint job on top is the worse I have had on any car purchased. My Cobalt still going and its 2021.

Let's start off with the exterior, the damage to the top coat they use to protect the paint is just horrible!! My car looks just terrible, next we will move onto how badly the under body gets so rusted just from sitting on a street!! No grass, no dirt no piles of anything just a parking spot in a lot it got so bad I needed to replace the fuel line & the filtration line, I was leaking gas & not even a check engine light came on!! Lastly this is the pne that really gets me upset, after paying almost $500 to replace those lines two day's later the anti theft light came on & now my car won't start!! Nobody will help me nor take responsibility for it happening on their watch! So I'd love to know how to get this car running again, I've tried all the you tube advice on reprogramming the key yet NOTHING works, that anti theft light just won't go off!! Please help someone????