1 it will not suffer them that turn the first time it ends an activation after that in play it will take the wounds
2 correct
3 yep it can hold the reactivate but once you have used it its gone jist like fast or if its in play at the end of a turn for some reason.
4 correct if you leave it on the table to use the reactivate it will take the 2 wounds.
5 not sure but i think it would only take the wounds once as it specifies this this activation.