actually i think you might be best with the allglass deluxe model hood, they run about $30 with one flourescent tube. the also sell incandescent for $20 at petco or wal-mart. that gives you the top and lights locally, i was unable to find any worth buying online when i checked, they cost a little more because of shipping. i would stay away from incandescent if you can afford it, they tend to cause temperature swings.
50 watts for the heater should be adequate, ebo-jager, tronic, or visi-therm are good manufacturers.... about $20 at a guess.
the airpump could be anything and even a simple airstone.... cant see that running more than $10. i might actually suggest looking into a cornerbox or sponge filter for added biological area in the long run instead of the airstone. you can, but i would not use it alone, my suggestion is more towards giving bacteria a place to colonize and minimizing impact during cleanings. the extra filter would be another $5-10 probably. most of my airpumps atm are made by "profile", any size should work for 10g. you should get a somewhat large airstone tho, if you don't use the filter idea, it will have to be sort of heavy to hold itself down with air going through it.
the filter, preferably HOB. whisper, aquaclear, maybe even a small emperor..... i would not suggest buying the smallest, overfiltration is a good thing usually. my 10gs that have bare minimum filters (whisper 5-15?) are always sort of a pain, and seem to get dirty alot faster.
a small gravel vacuum would be good also, that should be pretty cheap.
test kits, preferably a master set, but ph, ammonia and nitrite would definately be reccomended.
a thermometer or 2 would be good, i have glass and stick on and they both seem about the same.
dechlorinator?
etc......
www.bigalsonline.com
if you can buy any of these products online it will save you some money.