First off this is illegal unless you have proof that this is your car, so make sure you have your title handy. Also, it’s dangerous because of all the bare wires around. So don’t be a dumbass.
Now, before you start tearing that steering column apart, stick your flathead screwdriver in the ignition and turn it. If it’s an older car it will sometimes work. A friend of mine had a car like that and never used a key. If that doesn’t work use that screwdriver to pry the plastic panel below (or around) the steering column. You are looking for wires going from the ignition to the battery if that helps. Once that’s off, pull out the wires. They may be encased in a plastic shell, bust that thing open, we’re not worried about how the car looks anymore, aliens are invading!
Ok, there should be some wires hanging there. Those represent the different ignition positions; like lights or radio only. Two wires, usually red, are the power wires. Pull them out of the cylinder, strip the ends and twist the bare ends together. You should now be able to listen to the radio, but that’s not what we’re after.
Find the ignition wires, usually brown, and strip the ends. Careful now son, those wires are live and touching them would be like licking a car battery. Don’t touch the bare wires, just touch the bare ends to each other and you should see sparks. Once the car starts idling, rev the engine and put those ignition wires away. They still carry a charge so wrap them in electrical tape if you’ve got any. If the steering wheel is stuck then the guys at GM got the better of you with their anti-theft mechanism. Tough luck, try a different car.
If not, get going! Those aliens, communists, nuclear bombs, or asteroids are nearly here and you best skedaddle!