I would drain the gas and replace with new stuff and or add a very strong fuel additive to the existing fuel. Doesnt hurt to add it to the new fuel as well.
Check for brake lock up, stuck calipers and e-brakes
Charge the battery or replace depending on it’s age,
Check all fluids and top off as needed. I personally would change the oil before running it as well but if its topped off and not complete sludge you can do it later after you make sure it runs.
And just check all your belts and hoses for cracking or breaks, and replace as needed.
Also check inside your cabin air filter area and air filter box for mice or other small animals who like to take up shelter in hidden places on the car. If you do notice that there had been some unwanted guests just peek around for any chewed through wires as these could cause a fire.
And lastly check your tires for severe dry rot/weather cracking. before you drive it check for proper tire pressure. You may find depending on the surface it was sitting on you may have some flat spots in the wheels or tires.
Thats about all I would check first and once you clear all those bases then once you drive it around you may find other things beyond the “i’ve been sitting around for 1.5 years creeks and squeeks”