I'm a bit confused... did you buy it used from Amazon or from Apple's refurb store?
I don't see that price at the Apple Refurb store...
http://store.apple.com/us/product/G0JK0LL/A?mco=MjEwNTg3Mzc
Well if it's a refurb FROM Apple that's a crazy huge deal and yes you do get 1 year. I'd go to apple.com and punch in the serial to make sure though.
As for having enough storage... I didn't install any of the iLife programs, don't need them. All I really need is Firefox, Final Draft and Microsoft Office on it... I still have 40+ gb left.
I can still return mine... might do it now if I can get an Ultimate for 900 bucks.