MR2 key no longer turns ignition on

So I walked out to my car this morning, unlocked the door with my key, put the key in the ignition and tried very hard to turn  it. But it won't budge. I have put WD40 through it, wiggled the steering wheel, tapping the front of the barrel and even got another key made supposedly off the code written on the side of my key. All of these have failed. MR2Aus, can you please help me?
 
I don't have a spare key either, unfortunately. At this point I am thinking about calling a mobile locksmith to come and fix it, but the cost of this solution is quite frightening (been quoted $250+) given the situation.
 
Does anyone have any ideas??
 
Cheers 

Has your steering lock activated?

^^ ahh, dam.  I have had this before, certain pins break away within the barrel.  Unfornuately if the steering lock is engaged, you more than likely need to drill it out.  That was the only way I could get my barrel out to replace.

I'm confused, did you get a spare key made to try to turn it or have you only tried with the one key? Sometimes the teeth file down and wont push the pins far enough. If you have tried that might be time to get a professional in could save you damaging something else. Call an automotive locksmith, they should be able to tell you if this is common and possible reasons.