i have never taken a bladsmithing class but i did take 2 yrs of welding so expect some of the gear will be similar.
steel-toe boots
blue jeans, preferably no fryed ends on the bottom and no holes
good leather gloves, i like welding gloves, insulated
a nice set of pliers/channel locks
going w/ eye and ear protection you might want some form of tinted glasses, like brazing goggels, red hot meatl can be rough on the eyes.
a few (3-5) bandannas to keep the sweat out of your eyes.
this is all i can think of. i envy you, i dont think we have any bladesmithing classes around here.
above all have fun.