The rear quick-release is tightened wrong. You need to unscrew it and use the cam lever to hold the wheel in place.

It needs brake lever hoods, handlebar tape, new cables, and brake shoes front & rear.

Beyond that... sweet bike! For $200 out of pocket you have a bike many here lust for. I hope it fits you- the frame looks pretty large. (If it doesn't fit you... I'll take it off your hands. )