ProTools 8 LE moving to new iMac

Hey, I just got a new iMac (27" late 2013 model - OSX 10.9.5) and I got my Pro Tools 8 LE software moved from the old mac to the new mac - but I need some kind of iLock key to make PT8 LE work on the new mac - where do I get this iLock - and how do I know it will unlock my software? Also - new iMac doesn't have the firewire jack on the back, so I can't hook up the Mbox2 Pro to the Mac - are there adapters for this? Thanks for whatever you know - sorry in advance if I missed this stuff in the FAQ, but I didn't see it there