depends on the place you live for price....here i pay usually two for five...if your just starting out 1 bar should be enough (it should be an actual bar shaped pill with no coating crap on it and it should have three lines so that it can be broken into four peices....) now for colors....there's white...which is 2mg...yellow which i don't know the mg count, and blue...which i believe to be 4 mg.