One of the 4 dogs is crushed by a cabinet thing (but it doesn’t really show it or the body other than the tail and part of the leg when they box it up), 1 is possessed but survives.
To the absolute max. Ridiculous, over-the-top, prolonged, extreme projectile demon-vomiting - onto someone's face and entire upper body. With noodles. Revolting. There's also a vomiting scene earlier in the movie, way less extreme.
No, but there are some disfigured faces whose eyes don't exactly look healthy, or are even present, what with their owners being ghosts of burn victims.
A teensy-weensy bit of blood MAY be visible through slashes in a shirt sleeve after the arm inside it has been slashed twice. I recall no other blood and no gore, but there are ghosts of burn victims - their appearances aren't too graphic, though, since the skin seems intact (healed).
A teenaged girl died in a house fire decades before the events of the main story. We don't see her die, nor do we see her in the moments before her death, but we do see her alive in some flashbacks and as a ghost in the present.
No, only a bit cold... until they warm up. The coldness is almost exclusively directed at strangers, but among those strangers is their son's boyfriend, so it's somewhat hurtful to him. At one point, after warming up some, the mum tells someone that she feels that she and her husband have been too hard on their son. They did it for his sake, because they felt that he'd be less vulnerable to mistreatment by others if he learned to do everything perfectly.
There are some of the classic impossible, bone-cracking body postures you see in possessed people in movies. I imagine that some of it is, or looks like, dislocation.