I will start this off...
What did you run into on the drivers side?
The good news: you do not have to do anything and your car will still run, it will however leave puddles on your drive and wobble around the road.
Do an oil change, the new oil filter comes with the gasket for the filter housing. Or just buy an oil filter and replace the gasket, read this thread:
The control arms should be replaced in pairs, read here, one of my posts includes a video: