Need help please tell me what I can do ..!

Hello I turn to you here because I hope someone can help me hope hole …?? It’s about a car that I bought with my hard saved it’s about a fiat seicento abarth that I bought for 1700Euro with following dates Bj 2000 Ps 54 mileage 72,000Km Now the car I bought from my colleague that I’ve got it all ok.! (but what it’s not) the car had nen predamage cortflügel front left was bereft he had tried it out too the door had a long-drawn bump that goes vertically the damage was known to me but now he has told me before certain 7 people that he will heal me the damage all again so that the car does not look like an accident car (Ps it was a parking accident) he has not done anything to this day!!!!! he doesn’t want to do the cortflügel anymore because he thinks he has winter tyres for me gifted for it !!!but I paid for the mature 100euro!!!! He doesn’t want to make the door anymore he thinks no I told you I’m not doing this for the price with but said he’s also doing it now he doesn’t want to do the door now that I noticed last week when driving the current goes away saying blinker -ele.fensterheber.licht. servo.tubopin like speed tacho don’t go anymore…! and the car is light without juice and doesn’t go anymore on !!! was with the cars in the workshop battery is scrap and light machine!!!! Ps I told him before the purchase that he should do a new battery pure but the looked already very used !!! and the light machine is completely away you can throw in the scrap !!! flasher front right is full filled with water headlights have become very dark oil does not seem to have been changed ..! But the best comes now have bought the car about 5months ago he bought me before 5 people an engine warranty given on 6months ..! and the lighting machine belongs to the engine or not ??? as said he wants to do nothing on the car was at the lawyer but he thinks it can take 3 to 6 months until it comes to court ..! need the car with it to school and work without the dare I lose the work and the school I am looking for a lighting machine but find no cheap am nor student and can not afford me expensive you know what I can do please help me I don’t know meh Go on…!