Nintendo Wii Serial Code NINTENDO WII HELP PLZ HELP?

NINTENDO WII HELP PLZ HELP? - nintendo wii serial code

I bought a Nintendo Wii and three drivers that come with Wii Sports and two other games as Wii or something moving. Wan't where my product code is empty, the whole field and know all the cases examined, the game and found no money card, which can get new on my code, I found a serial number on the back of the Wii is that the product code? or something more? So, how can I check the product code into the Wii menu, someone told me in the Wii Menu, go systems, and the serial number, but I updated my wii and there is no option serial number? Someone knows how can I find my product code, please help thx in advance:)