1970 Buick Skylark mpg? transmission type? wheel drive type

need to be careful what your getting when going for classics like that..first off does it have all paper work so you can legally get it put in your name and get it insured/licensed? are parts easy to find in your area for that vehicle? pricey parts? does it have all safety equipment required to pass law such as seat belts, all lights etc...? is it rusted underneath or in hidden places such as under carpeting? the '70 skylark came stock with either a 1 barrel 6 cylinder, 2 barrel or 4 barrel 8 cylinder 5.7L OHV. Transmission I believe is a 3 speed manual. It is rear wheel drive, the first FWD skylard was in '79 i believe. anything else would like to know?