Fiction Queries

I googled this but can't understand head or tails so I hope someone can help.

I'm writing several disability fics and need some info. First can an incomplete paraplegic still have an erection and jaculate?
Second can he/she have a normal bowel and bladder function?

I read somewhere about bone overgrowth in amputated limbs aspecially with war amputees. So can it be operated or does it come back and can it get so worse that the person can't wear a prostatic?

Someone who is born with arthrogryposis sometimes has clubfeet too specially when it effects the lower limbs and also that when operated on it can still come back, can that person still walk or is he/she confined to a wheelchair?

I know this is a lot but all the English medical terms are just a lot of well you know, so please if anyone can give me an answer, plain english please. *hugs* Thanks a bunches.

Could someone tell me, or show me where I can find out, what the typical cost for emergency surgery (and etc) would be for a bullet wound in someone's shoulder?

This story is set in an American hospital.