here is what you do first disconnect the battery unscrew the plastic shroud around the steering column by unscrewing the screws at the bottom after all the screws are out force the plastic shroud apart and remove it, from the bottom, on the bottom of the lock cylinder casing there will be a push pin retainer this is what is used to hold the lock cylinder in place, it looks like a nail with the top cut off, turn the ignition toward the on position while holding pressure on the pin with an awl or something like that, at a certain point you will feel the pin push in and simply pull the ignition cylinder out holding the key as a puller..You wont need a lot of pressure
Once the ign cylinder comes out see if it looks like it is broken..Look at the tip if it is broken you will have to fish the broken part out it will be about a 1/2 in piece,,Then go to an auto parts store or ford and buy the ignition cylinder put it in the same way it came out and put it all back together...
If the column is broken that will be more compicated..Also if it is a transponder unit you will need to get the cylinder keyed to your key by a locksmith or sometimes the ford dealer.
This is an easy job i have done many of them.. (good friend is a locksmith) he said it should cost about $25.00 for the part depending where you get it..He charges $180.00 to do the job with parts and labor..Here in NJ it is more expensive
Its pretty easy let me know what happened you can pm me anytime