Considering the creature we see in the Ewok Adventures TV movie, the Ewoks were setting traps for things larger than humans that ate meat. Most humans wouldn't be baited into a trap like that, just Chewie. As to eating Solo and the others, he's directly offended their new god, they must be sacrified in the old ways.
The Imperial prisoners would be taken to the fleet as is standard in most wars. Prisoner exchanges, information, or sending keeping until they can be returned to their families in the war's aftermath.
The dead? Well there is a grey area. Does the Alliance send their bodies back to their familes, or just their ID tags and let the Ewoks eat like kings for a week? Or do they know how to salt meats or make things like Trooper Jerky?