I agree with suzieqtwa, and just want to add that you definitely need a repair kit for the inevitable flat tires: a spare tube, a patch kit in case you use your spare tube and get another flat before you get home, some tire irons to help you remove the tire, and something to inflate the new tube with--either a small pump or a CO2 inflation system. Plus a little underseat bag to carry it all in. Practice changing a tire while you're at home, so you'll know what to do when it happens out on the road.
As your rides get longer, you will need those padded shorts and gloves. Don't skimp on the shorts.