Car accident help!

So I accidentally backed up into my neighbors car because he decided to park it on the side of the street infront of our driveway making it very narrow. My fault but he has a big empty driveway!! Anyhows his car only got a small scratch were the paint came off. He got me a copy of estimate pappers and its over $1000. As I was reading them I saw that he is getting other things fixed other than the little scratch. He is getting like new tail lamps and rear bumpers and stuff fixed on his doors when I didn’t hit that. Im soo confused. Am I obligated to pay for everything that he got the estimate for or just my part because this seems like way too much for me to pay for a little scratch.