Slow cranking: Start by cleaning ground connections at engine from battery.

MacBook pro smc/ charger problems?

Last week, my MacBook shut down unexpectedly and has been doing so on and off ever since. I've come to the conclusion that it's something to do with the SMC, and I've reset it several times, but each time my Mac shuts off, the charger has a hard time working again. I usually have to unplug from the socket I was at, use a different one, and switch around the Mac end of the plug until the light comes on. This time, however, I haven't been able to get the charger to work no matter what socket I plug it into and how I plug it into the Mac. My battery is at like 3% so I turned it off, but I'm in college and about 80% of my work is done on there so I need this fixed, if there is a way to fix this without taking it in, please let me know, I really can't afford getting a new one or really expensive replacement parts

So the other night I parked my car and ended up making contact with a curb that was a little higher than normal. It ended up leaving scratches up the front side of my car as you can see in the pics.

I was wondering a couple of things:
1- How would I go about fixing this on my own? (what supplies and what is the process?)
2- If I had a professional fix it, how much would this cost to fix/how long would it take?

Thanks, I appreciate the help!

You're crazy to do this without one.