Usually, top surgery is suggested when you are 18 or above the age of 18. But you can get top surgery at 16 if you have your parents approval and after consulting with a qualified doctor. 

Yes, transgender women can have sex.

• She might engage in vaginal sex with a woman while still in the pre-op state. 
• If she has recovered from surgery, she might engage in vaginal sex with a man as a woman.

Yes, transgender people can donate blood.

However, there are only two restrictions that need to be followed:

• They must wait three months after having sex with a male or transgender partner.
• Or they can donate if they have sex within the previous three months before

Yes, transgender men can get a period.

• This situation occurs when a man's gender identity conflicts with the physical characteristics of his body. 
• He may have even modified his social role and appearance to reflect his male identity, but if he still possesses his natural female reproductive organs, he will still experience periods.