Sexual

Yes of course. It is good to discuss such matters with trusted person like your family members because they will guide you to the right facts and try to protect you from misleading information.

We should encourage our young ones to be more frank with their trusted family members in such matters.

Wassalam.

No. The Mahr is the right of the woman which can be money or teaching or any other benefit. Sexual acts between husband and wife can not be a Mahr.

Wassalam.

First of all we need to be sure that she is really a woman. This assurance does not come from her recent appearance which looks like a woman but must come
through medical confirmed results that the DNA belongs to a female
human being. When a person is a female by genetic structure but
because of abnormality she looked like a male and then she went
through a surgery to remove the abnormal organs and develop the female
organs, in this case she is a female and marriage between a Muslim man
and a Muslim woman is possible. But if she does not have female DNA
and the operation was just for removing the male organs and creating or implanting 
female organs instead, she is in fact not a female, so there is no
question of marriage between a Muslim man and such a person.

Same situation applies on a woman who undergoes a surgery to look like a man wth out a DNA confirmation about the real gender.
Wassalam.

Ghusl of Janabah is obligatory not only because of sexual intercourse
but also if a person ejaculates whether deliberately by masturbating
or unintentionally by wet dream or night discharge. This is for males
and females.

Wassalaam.