im sure someone with more knowledge will help soon but when i get a car i always just check the obvious ones like the sills, make sure theres not yellowish gunge under the oil cap and stuff and always test drive it so you can here any knocks and bangs plus that allows you to check the clutch and gears also im not sure if theres any common faults with non turbos or turbos but as i say im sure someone will have better knowledge good luck buddy