Key lock and no start after jumping with battery Charger?

So, my truck was running okay, I did notice the past couple of days it was having a tough time starting usually starts on first turn. I should say a couple days before that I had a security link out issue, I'm not sure what happened but I couldn't get my car to start after I believed a motion detected security breach engaged disabling my car from starting. I looked up how to resolve. Reset my security still would not start. My boyfriend pulled out a battery charger and started right up I drove car for the time estimated to give a good charge and viola however I was told that putting a charger on a battery while still connected to car can create issues with the battery due to the amount of voltage it can run through the charging system. And here I am, I got up the other morning and my car was dead. I put the key in and it would not release the key I checked the shifter and it got stuck in reverse or neutral I ended up getting it into park but my lights and bells would intermittently go off as if not a good connection so a friend was going to give me a jump and I heard arching underneath the hood of my car in the fuse panel box. I do not know what to do next.