how much is an averge but decent bow set up?

if you've already got your bow it shoudln't be too bad. you can get the top of the line AMS drag free reel kit which includes the reel, mounts, and 2 arrows and a dvd for $130. but there are other options. a zebco 808 will run you about 30 and a mount will be another 20 arrows are about 15.
finally (this is the one that i first started out with) i found that this works good you can get a whole rig for around $30 and you can get a better one once you've gotten better. the only drawback is that after every shot you have to wind the string back on the spool manually.

http://www.fsdiscountarchery.com/index.asp?PageAction=VIEWPROD&ProdID=1274

you can get set up for about 50 bucks if you already have a bow. zebco 808 try a pawn show can get them for 5-10 bucks i just use a hose clamp and atatch to a stabilizer you could probably get yome used arrows also