There were rebirths as in change races, reset their level, change genders etc… He didn't know all of them and 'whole body' was a rather vague term to be working with.
A homeless person wearing purple equipment? Sounds Like Aizawa from bnha
Visible was as it says, visible. Energy means having a faint energy outline of the equipment over what you're already wearing. Hidden means not viewable at all. A homeless person could be wearing a full set of Purple equipment for all you know.