Lost all keys Cheapest solution?

I lost all my keys for truck. I tried going to dealer for new key to be cut it didn't work as I think someone previously replaced the ignition. I can get a new ignition with two keys for around 90 from the parts store which would work but I cannot get the old ignition out without a key to remove it. Is there a way I could remove the ignition without a key without damaging so I can maybe read the key code off it?