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
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