How many miles? I'm guessing 1E miles is not really 30
Helmet: find something that fits YOUR head. Ditto for backpack, that is going to be a fairly personal decision. I'd personally go for a rack that I could put a bag on top of if I am commuting, I'm guessing that's not going on an Emonda though.
Tool kit: a pair of tire levers, a spare tube, and a pump. Also extra quick link for the chain.
Also a lock, if you are commuting to a university. Preferably, a decent one.