Had my GTR sitting in the drive for over 9 months.
Just put new fuel in it, charged the battery and started it up. All was fine. Let it warm up at idle, then switched it off and changed the oil + filter.
Then, threw it on the dyno to check to see the fuel pump isn't nearly dead, etc.
Now she's good as gold.
GTR's have a plastic fuel tank, though. So I didn't need to worry about that rusting through.
I never pumped up the tyres, changed coolant, started it up, turned on the air-con, changed brake fluid, etc.