This Reloop Mixage is perfect for beginners to intermediate DJ's. It has plenty of mappable controls, is supported by Traktor software (and others).
It uses a USB type A to interface with your laptop/PC. Has a mic in and headphone out 6.35mm line on the front and coaxial audio out on the back.
No cables come included although they are very common and it is more than likely you already have them lying about. (otherwise they cost about £2)