Too many issues

[jetblack24]

It all started when a coolant line from my turbo bust and my car overheated. Well I fixed the line and then it was runnin rough. Sounded to me like a misfire so I did some tests and found a bad coil pack on my number 2 cylinder was bad. I changed that and now I'm still gettin a mis, It smells like a gas station and now my starter will turn over about 3 times and then makes a loud noise like metal on metal and won't turn over again until I cut my car off and cut it back on... I'm lost! Any help would be greatly appreciated. The only thing I can think is a bad injector causin the mis and smell.