bmw 325is restore help

Would it cost and how much effort would it take to restore a 1990 325is? I found this 1990 325is in fairly good condition for 1200: http://sfbay.craigslist.org/eby/cto/1436210838.html I am young and don't know much about restoring cars. I have my dad and my girlfriends dad who could help me...