Hi, some sort of preamp for the mics will come in handy.
As far as mixers go, Behringer makes some very affordable mixers. I use a Behringer eurorack mx 2004a 16 track mixer with an alesis nanoverb effects processor. The mixer has fantom power, and of course the ability to dial in the sound with the eq, the alesis does the reverbing and other stuff. Works pretty well for both vocals and guitars.