Reply to DJM T1 question

Hi,
Im quite new to djing and I wanted to buy something i could begin with. I bought Pioneer DJM T1, a traktor mixer. Everything seems to be working fine except that i dont get any sound. I only get sound when i select audio device as my laptop in traktor settings, but then the mixer is not working. And when I select my mixer as audio device theres no sound
My question is, what kind of set up do I need to get it working? All I have at the moment is the mixer connected to my macbook through USB. Do I still need speakers and cdjs or can I just go like that. I would rly much prefer to have solely my laptop and mixer as my working space is very limited and I dont want to buy speakers atm.