When engine is first started it knocks but when engine warms up knocking goes away

2006 pt cruiser 2.4l turbo , using black keyfobs and immobilizer plug no light , turn to start , no starter sounds , odbii codes are u01415,uo100,u0141 , replaced pcm , still no strat or crank

Bought this 05 cruiser from a snake oil salesman from a craigslist post of $2985.00 with who claimed it would last me a long time as long as I took it easy. Instantly dismissing the shaking that I felt in the steering wheel at approximately 30+ mph from the first test drive. Said oh that lil shimmy, it's no biggie I just drove it to ___ (city 1hr away) and it drove fine. Then the very last thing he showed me before I drove away in my newest craigslist investment was how the ignition would lock the key unless I jiggle thr gear shift (then it releases the key it like a normal ignition does when… Read complete

2005 pt cruiser, our daughter ran over a concrete rock and punctured the oil pan. It was never driven after this happened because it wouldn't crank and she was not aware it damaged anything. It sat there where she parked it for a few days until we could get it towed home. It still had a bit of oil in it. So, we've since replaced the oil pan,oil, & gasket. Thinking that it was the only thing damaged and it would start right up, but it doesn't. It turns over, and sounds as if it is going to engage and start but doesn't. I'm wondering what else could be damaged underneath that could cause it to not start? Or maybe a hard enough jolt that could have jarred something a loose?

My ignition switch went bad and a mechanic fixed it. But after he fixed I had no radio. Explained my radio worked before fixing. He got radio to work but noticed that my driver door when it’s open or stays open it makes the same warning noise it makes when u leave ur lights on. It never did that before. Not with the door