there's a thread by avrojet a couple of days ago on the same subject
newbie wanting to try fly tying
IMO, starter kits are often a waste of money as you end up with a load of material that you never use.
A lot of people on here recommend a trade member, Grommit. Phone him, tell him you're a forum member and what you have in mind (kind of water fished, or particular flies you want to tie) and he'll treat you right and won't sell you a load of unnecessary gear.
Start basic and build up - it spins out the retail therapy side of things, anyway