I just bought this car and am trying to buy new parts to fix it up does anyone know what kind of car mustang it is and what the size of hood is
It's a 3rd Generation Mustang (or "Fox" / "Foxybody"), produced from 1979 to 1993. Specifically, it's a "Four Eyes" car produced between 1979 and 1986, the '87 onwards car had a re-styled front end.
Sorry, I can't give you hood dimensions but you ought to be able to measure the one you have. Good luck with the restoration!