Can anybody help me figure how to run this setup at home?

[razy]

Basically I'm pretty new to this and I need some serious help haha.
Here's what im trying to do.
I have a djm-500, ONE cdj-1000 mk3, and a speaker.
I'm planning on using my laptop with traktor 3 to run the other song to mix because I dont have another CDJ at the moment.

So here's my question:
What else do i need? (external soundcard? if so, any suggestions on a good one for recording as well?), and how do i hook everything up..

thanks, any help is greatly appreciated.