Hmm...paints...
The thing is, you could use other brands besides the GW/Citadel paints, but whenever you see references to colors, it's always going to be using the
GW/Citadel name. For example, the browns are: Leprous Brown, Bubonic Brown, Bestial Brown, Vermin Brown, Vomit Brown, Snakebite Leather and Scorched Brown. Now how and which colors are the equivalent in Tamiya or other brands, you got me. That's the disadvantage of not using their paints.
I think the paints normally retail for $2.25 or $2.50 (USD) at the local hobby store. There's one store online that carries them for $1.59 -
Action Village - WarhammerGear. If you look at their
Lord of the Rings page, you'll see two paint sets - one for the Fellowship and one for the Uruk Hai. While they're decent - I wouldn't buy them just for the paint - the little tubs are little - and as for the "painting guide", there's a great deal of information in the Two Towers manual.
Here's a review I have found regarding the Two Towers Game:
Product Review: Lord of the Rings: Two Towers Boxed Game
As for retailers (with below retail prices), I've seen some references to
Action Village's WarhammerGear.com store for GW / LotR stuff and also the
WargamesWorkshop.com - Lord of the Rings.
I have never purchased anything from either websites - I just recently found them. So I can't give you any feedback based upon personal experience.