I was wondering if i can upgrade pro tools se 8 to the full version for a discounted price since i bought an interface?
Probably not as the developer of pro tools hates you and everyone else who owns pro tools. I'm only half joking.
Unfortunately not. The cheapest route is to get an interface with LE 8, upgrade to 9 for a discount, then get the free upgrade to 10. If you choose the right interface, you end up with a decent interface + Pro Tools 10 for CHEAPER than just buying Pro Tools 10.
It also sucks that you have to have an iLok just to get a free trial. What the heck?