Q: Forgotten iCloud lock Pin code on MacBook Pro !

Hi, everybody !

So let's start by the beginning, I got my first MacBook Pro there is 7months ! And during the Holidays I got a new iPod touch 4th Gen. I have ever wanted to try iCloud ! So, I tried to lock my Mac with the iPod touch and it didn't lock ! And 2months passed since. One day I looked arround my iCloud settings on my Mac and I saw that the "Localize my Mac" option was disabled ! So i enabled it and automatically the MacBook shutted down and locked itself !
After that I understood that the request I sent from my iPod was online and was waiting until the "Localize my Mac" fonction get activated on the Mac ! But i don't remember the password I used !
I have all things that can prove that I am its owner ! Even the Mail i got when it was locked ! So I live in Africa, in Sénégal ! I brought to the Apple Prenium reseller, and they told me they can do nothing for me ! They told me that the only solution for me, was pull out, the HDD and plug into another Mac then reinstall it ! But I refused because I have seen on the web that the 2011 MacBook Pro have been equiped with a chip on the motherboard that contain the password.

So I told myself that even if they reinstall my HDD, it will still ask for a Password cause this one is located on the chip but not on the hard drive !

So please tell me what to do !  I am LOST ! Just want to cry cause I learn with my Mac.

Please answer me:If they reinstall my Mac, will it work ? even with the chip on the motherboard ! Any Help would be REALLY REALLY appreciated ! I can't take a plane for the USA only for this !