Is this the first time installing a tranni? good thing you didn't turn it over the engine. if torque converter is not seated all the way, you can ruin front pump assembly.
So the vehicle has used parts from junk yards?
i bought some parts cars in past. after i parted out and junk the shell, i bring the tile to a dmv and tell them i junked it.
Yeh broken shift cable or broken shift fork. Try shift it manually by the transmission. Or have someone shift it while you watch the gear selector on transmission.
Make sure you clean the rotors with brake cleaner. apply synthetic grease to caliper bolts. I usually don't siphon fluid from reservoir unless fluid is full. if your brakes are worn, fluid level should be half full or low.
You might have frozen caliper slider bolts. Take the wheel off and hit the caliper. most likely have to remove the caliper and replace slider bolts. I had to replace my 95 talon rear calipers.