You don't have to spend a fortune on cycling specific clothing. An $8
"Starter" poly t-shirt from Walmart works just as good as a $50 jersey for summer heat.
If you want clipless & most of your riding is urban stop & go or commuting then go with spd's & mountain shoes. You will be more comfortable off the bike & your cleats will last longer.
Wax/Dry lube always.
Visit Park Tools, Sheldon Brown's page or search the "mechanics forum" before working on your bike.
Also, don't waste your money on "designer foods" for cycling. Fig Newton bars, trail mix, breakfast bars etc etc will get you through those long rides. Let the pros buy the $20+ (box of 6) "power strength & recovery max fuel protein endurance" bar of the week.