I would go with a good carb cleaning, maybe rebuild, absolutely change the oil, oil filter, and coolant, and give it a general tuneup.
thats pretty much what I did for mine, and mine was parked for about 4 or 5 years, although it was all inside.
its also a good idea to check the intake path for rodent nests, they like to live in those sort of spots. not a whole lot else I can think to suggest.