you will need a lab coat for most of the science based units... why do u need one for biology???? --- because it can get really messy, you can deal with chemicals and its an OH&S law that the uni has to follow... lab coats also come in different sizes so be careful when buying a 2nd hand one (so its not too small or big).. some uni's provide safety glasses that they wash every time someone wears one, but if u look around you can find some better looking ones if ur style conscience...
My advice -- buy a new lab coat
and look around for different safety glasses also if you normally wear glasses you can normally just get away with wearing them....