I met a locksmith, his price was about $25 for the appointment in a parking lot, and he R&R'd the tumblers of three lock cylinders, for $20 more. Call around for a better price.
Kari, how does your ignition key work now, and before the problem? Your father might be correct, it does rarely happen that if the steering wheel is not free to move when the key is removed, the key will not turn properly when you use it again. The pressure from a steering wheel trying to spin in either direction because of how the vehicle is setting, that does bind up the ignition key/cylinder. To free it up you just need to know which way the steering wheel wants to turn, and turn it back the other way slightly, to relive pressure from the ignition cylinder.
Usually when a lock cylinder goes, it goes very quickly, it may cause trouble for a short while, and then it eats the key, will not let go of it.
Your father I'm sure just does not want more problems caused by another poor starter/alarm installation. If done correctly no harm should occur. I'd be far more worried about the existing electrical issues, than a new alarm install.
Do work with your keys in all of the locks, they need exercise, and do have at least three keys total. If made properly a copied key should be as perfect as the original. I understand that some keying machines just copy the old key, you do not want that kind of key service. My Ford parts man sometimes does keys for me at no charge.
At Ford when they make a new key they note what the individual key levels are, and set their key machine to those individual marks. The used key is not copied, a new key is made by measuring the levels of the key teeth. I think they can be from 1-5 or so. The new keys are like any combination, there can be a code used to describe each key, like 3/2/5/1/3/4/2, etc. Get your keys cut by a Ford Parts Dept.
Work on that transmission soon, if you have something turning up in the fluid. If it's not the V8 trans, then there is a certain need for a special valve body kit to improve it. Ford has several different upgrade kits made for each individual year model, a kit and gasket/plate etc.
I would recommend skipping the various Ford upgrades(you have to be very careful to get the correct one for your model of trans), and simply buy the TransGo valve body kit. Their kits are much better, they applies to every single model of the A4LD, or the 5R55E. You don't need to figure out which kit part numbers to research/buy. Just confirm which trans that you have, and take that information to any supplier of transmission parts. They will have the kit, and the Lubegard, and the EPC solenoid, Sonnax boost valve, gaskets, filter, ans a ATSG tech manual for the trans. Good luck,