Yes - that would be for 2 adults. Again, all speculation, but it certainly won't be $200 a person. Consider Disney charges at times $800 a night at Boardwalk, the only thing holding them back is worrying that at a certain price point not enough people will sign up - they will want to fill the resort from day 1, so again I think initially you will see it be even maybe a little less. ($600 - 800 per person) but will price up quickly once it's a proven success.
I would think it will be inclusive of food.
Hard to say - but yes I would guess there will be specific characters to the hotel. Don't know that they would be big names like Luke and Leia though. The problem is that they can't really mix eras in this concept, so it will have to be set in either the 1-3, 4-6, or 7-9 eras - unlikely to be 1-3. That will limit what characters can show up. But I could see having like Boba Fett or someone like that that you rarely see.
I don't even think enough is known to speculate here. Could be just one long mission that goes throughout your stay. It probably will be very individualized. You will be assigned an experience for your family. Other people will be having the same experience, but the timing of it will likely be slightly different. Or could be a big pile of mini-missions. Think like the Agent P missions in Epcot. That said, I think this will be throughout the stay.
I think this is a given - there will be some sort of exclusive access - most likely an after hours type thing I would think.
The whole thing when you think about it is fascinating. Do you have a swimming pool at this resort? All that money and no pool? Is it really that you are "locked in" to this world for 2 days? Do you have a TV in the room - or only a view screen that can watch Star Wars related stuff? How immersive is it? The big variable in all this is the behavior of the consumer. Won't there be people that want to do it, but don't want to be a "part of the story"? What happens when people don't feel the story is good enough for what they are paying? It's really a pretty big risk Disney is taking - something Universal could've easily done with HP but didn't.