Thanks for all the great advice! But frustratingly, I ended up having to put the old brake pads back on and everything back together with the intention of taking it in to the garage for the brake job. Everything is just too solidly rusted in place! I couldn't budge the caliper (lucky the old brake pads are so work they fit in) and no way I could get the caliper bracket off. So I admit defeat and here comes the credit card to pay for this it's going to be expensive as labor here is $100 to $150 an hour :(

Now I still have to see if I am brave enough to try the ignition replacement so I can actually start the car and drive to the garage!