2001 Ford Focus lots of issues :(

I'm not very good with cars so I hope I explain this.

I bought a second hand car for £475 and it feels like it's falling apart, originally I could hear a grinding noise so I took it to a garage and he said it was the bearings he replaced them and the brake pads still didn't work. Then he said it was the CV so he did something with that and it seemms to have worked

now however my back window wiper has stopped working my passenger side window has slowed down alot my car doesn't beep at me anymore if I leave the lights on and open the door. And also i'm noticing a pause before acceleration the car feels very jumpy :\ any idea?