here's what I would do.....
1) Take off handbrake and push the car out of the garage (this will test that the brakes are not stuck).
2) Check tyres - they could have 'flats' where they've been standing and may have become deformed (see 9 below).
3) Check oil, coolant, brake fluid and screen-wash levels.
4) Turn on ignition and lights - are there any? i.e. is the battery flat.
5) Recharge battery or if OK turn ignition to turn the engine over a couple of times - not to start it - but to get oil circulated & petrol pumped up.
6) Turn ignition to start the car and let it idle for a while - check for leaks.
7) If the car is dusty, hand-wash the windscreen - don't use the wipers 'cos you'll scrape them.
8) Once the car is warmed up drive slowly and check the brakes in a safe place (also keep the brakes gently on to clear any rust/deposits from the disks/drums).
9) Continue slowly to the nearest garage and get tyres to the correct pressures. Drive normally back. Stop en route and check whether the tyres remain deformed - if so get replacements - safety first.
10) Give the car a thorough hoover, wash and polish.