Reply to supernoob: how to connect mf pro+cdj 350+traktor pro 2

So, like the title says I am quite the noob. I have a buddy who dj's but mf pros are alien to him, so here I am. While I'm working on original music I'm piecing together my rig. Currently I own the mf pro, cdj 350 and traktor pro 2. And before I buy anything else I need to know all the components to make them work. I'm assuming I need an audio interface and a mixer. Beyond that, I'm at a loss. Help is greatly appreciated.