Depending of the occasion. For a wedding, if you are just a regular guest, I think it's ok to wear a suit without a tie. Better is to ask your friends. Depends on the formality of the wedding.
if he wishes to, then yes
Unless otherwise specified as a black tie formal event(or white tie) what you propose would be perfectly acceptable.
A white one, with a tie.
Yes it is ok. In my opinion ,you should wear a white button up long sleeved shirt,red tie and a black suit.
Yes it is ok. In my opinion ,you should wear a white button up long sleeved shirt,red tie and a black suit.
To be on the safe side, choose a color that won't be seen as white.
White knee-length ones might be ok.
It means that it's OK to moor or tie up there.
A black tie. Assuming that the shoes will be black.
Depends, but no it is not OK you need to tie up your horse up to a horse trailer or were you are supposed to tie your horse
yes it's ok to tie it up