the bride and the groom is first, then the bride and her father, and then the groom and his mother. After that the bride dance with her new dad and groom dance with his new mom.
A bride groom is a male. Bride's maids are females.
The opposite gender of groom is bride
It is only proper to write a check that is a wedding gift to both the bride and the groom. Since the wedding is all about them becoming a couple, you wouldn't want to leave one of them out for this occasion.
Both
I think that it is more usual for some friends of the bride or groom's parents to host a shower or some of the bride's girlfriends but it is not improper for the groom's mother to host one if she would like. If there are other showers being given, I would not do another one if I were the groom's mother. It is nice to have the groom's mother and the bride's mother just enjoy the showers as guests.
bride and groom or horse and groom
The bride and groom can pay for it themselves.
He's considered her "fiance"
Yes it is proper for the groom's or brides' mother to carry a purse down the aisle. They are not in the wedding party and like the rest of the female guests a purse is a must. It would be advisable that an evening purse be used which is smaller, but if the groom's mother insists on a purse that is comfortable to her that is quite acceptable.
Yes, it's absolutely proper for the groom's aunt (and/or the bride's aunt, also) to host a bridal shower. The main ones who shouldn't host bridal showers are the parents and grandparents of the bride and groom.
The groom buys the engagement ring and band for his bride to be and the bride to be buys the band for the groom.