It's about $100 for the cylinder with a new master key (key alone is $40 at dealer) and the change out only requires a large paper clip for a tool. Below is a link to directions for removal of the cylinder, go to section 46 (steering) and the sub-section 640, it's in PDF file formate and the actual directions start on the second page. This job of replacing the cylinder take's about 10 minutes of reading and rereading the instructions, because you won't believe how simple the job is and then about 3 to 5 minutes for actual replacement of cylinder.
Cylinder replacement