Not sure on 5 and 7... watched 8 again last night (I'm guessing it's the original?)
Yeah, it's the original. I never saw the American remake.
No, #5 is not The Hunger.

As far as Korean horror goes, I hear good things about The Host, which I have yet to see. Then there's I Saw the Devil which was kind of interesting.
I watched The Host about a year ago or so. Maybe my expectations were too high or something, but I ended up not really caring for it. I mean, I suppose it was worth seeing, but I wouldn't really recommend it, and I definitely have no intentions of watching it again.
**********
Anyway, sorry I'm so late with a hints post, but I've been out out all day running errands and doing winter-prep yardwork and whatnot.
So, here are some hints for you:
#1: The first cinematic installment adapted from the three-part series of blockbuster young-adult novels. The story is set in a non-specific, post-revolution, dystopian future in which token members of the resistance fighters' families are pitted against each other in a fight to the death for the televised entertainment of the ruling class.
#3: This one is a 2010 crime thriller, co-written and directed by Ben Affleck. He also plays one of the lead characters, a member of a group of friends and life-long thieves from Charlestown, MA.
#6: It's only fitting that Clive Barker's directorial debut is a film adaptation of one of his novels. The novel goes by a somewhat different name, though. The puzzle box artifact in the screenshot acts as a portal to the hellish realm of the Cenobites, whose devotion to extreme sadomasochism is beyond what the film's main characters could imagine.
#7: When you lunch on questionable Brazilian food at a sketchy restaurant, then go to at a top-notch bridal shop looking at gowns, beware that the gut-wrenching results of the food-poisoning may hit while you're trying on a gown from a top designer. "It's happening. It's happening. It's happening.... It happened."
Hope these help!