True, but if water was there first, then it would be the same water, unless it froze, because no heat from the sun. etc. so yes, true, sorta
of course not. But the sun is somewhat special in the fact that it is a lone star, most stars exist as part of binary or tertiary systems and other multi star clusters.
'Solar'
they are in the photoshere
If you mean whether the Sun rotates around an axis: yes, it does.