just because the brake is off dose not mean it is not sticking, thsi is usually do to rust. if the parking brake was left on then it could be sticking to. you might want to try and spray a rust penetrant on the moving parts and try and make the parts move. try and work the parking brake and the brakes several times to get them to free up. you can try and tap on the drum brakes (rear) with a hammer. if it is not a brake problem then it is a drivetrain problem. you can try and force it to move and it may end up brakeing free (get a truck and a chain and try to pull the vehicle a few feet forward and a few feet back---just be careful)
Don't do this unless you have a proven way to vent the engine exhaust to the outside. Engine exhaust contains carbon dioxide which is deadly to people. It makes you pass out and then kills you. People have died from sitting in a closed car outside.
If the engine is running it is using fuel.
traffic
in neutral while engine warm and running. be sure to have emergency braake on.
Who told you that? No you can't ruin a car engine by running the air or heat while sitting in one place for an extended period of time. It's not good for the engine to sit for a long time running because oil builds up on the seals and such but that's about it.
Blower motor switch. Put it on High and it will blow when sitting still with the engine running.
Yes, but don't tow it in drive or neutral, it will damage the transmission
Most automatics require you to depress the brake pedal.
You have to lock it from the outside with an extra key.
Perhaps. But it would be quite rare. no, they are made and stored outside an engine in warehouses.you should keep it oiled and in a good safe place where it won't get dropped,or damaged in any way.
Spray down the throttle body outside to clean it & prevent anything from sticking there. Then while the engine is running spray inside intake as long as possible without stalling the engine. This should do it.
Quality vacuum gage is required ;-) engine at running temperature around 18 to 20 inches Hg = vacuum