From what I can understand you only wear the lab coat when you go to the hospital to pick up you're patients. At least that is when it's required. All of my friends who are nurses or students said no other way around it, you must wear nude (color closest matching to you're own skin tone) when it comes to underwear. :)
I haven't gotten my books yet bc I need to wait for book vouchers to come out. I did, however, have to special order my scrub pants because I am so SHORT!!! lol! They had to special order petite white and navy blue pants for me!!!