naruto bm - if it hit it would NOT cause damage to naruto. when amaterasu hit hachibi it was the hachibi that suffered.
however, kyuubi does not have yin chakra, so no shape and form. just chakra. it might be able to just slip through or change shape to remove the affected area. also, because it is yang chakra, it may cancel out the amaterasu and stop it from causing damage.
amaterasu has blitzed through lightning armour before.
if death god has a real body then yes. if not then presumably it could dematerialise away.
susanoo, probably, since it is yin chakra and all uchiha techniques are a manifestation of yin.