[Brian in Tucson]

I think I'd do my best to get all the old gas out. If it's too funky, pay a car dealer to dispose of it for you. Otherwise, you could use it in an old pickup or motorhome. Yes change the oil and filter. You can get a coolant checker to see how the coolant is doing. To just get it out, changing the coolant and brake fluid isn't necessary, but do them soon. Same with air filter, cab filter.

Bring it back to life gently. And be sure to use good premium gas--I'd use Chevron with techron.

Tires will be okay to drive to a tire store for replacement, but keep the speed down.