The six set of four numbers is what an Adobe serial number would look like.
When you install CS6, It will start as a trial with a countdown timer. It will offer you a chance to input the serial number and if that number is good you can activate the software.
One important word of advice: Register your software under your Adobe ID. Many years down the road you will want to move it to another computer and luck will have it, you lost track of the receipt. Then you can go into your Adobe account and retrieve it, no matter where you are.
Gene