All kinds of things are common after a TURBT (with or without Mitomycin C).
If I remember correctly, they want you to be able to pee on your own before they let you go home without a catheter. It all depends on how much they have to do when they are in there. I've gone home with and without a catheter in the past.
Not sure you should need narcotics after going home though. Pyridium and other drugs can help with bladder pain without messing with your head. Another good question to ask the surgeon. Bring your list with you.

You'll forget some otherwise. At least I always brought my list and my wife hung on to it for me (in case I forgot I had the list).
Mike