Re: Ignition switch key won't turn
Umm, big problem. You could try a shot of WD40, work your key in and out rapidly about a dozen times. Try it, jiggle the key up and down, in and out, jiggle, jiggle, jiggle. If you get it to turn,DON'T,DON'T DON'T turn if all the way to the off position.
Then either remove to key cylinder yourself and replace it, or have the dealer or a locksmith replace it.
I suggest a locksmith, they can set a new lock to your existing key.
It's obviously cheaper if you drive your car to them, rather than them coming to you.