If you get a sex change from male to female will you look like a girl?

Generally yes. On average, females spend more time on their looks, however. This may lead to a difference depending on the person. The gender people tag you as has a fair bit to do with your attitude on life, and how you hold themselves.

There is a surgery called Facial Feminization Surgery (FFS) where surgeons do plastic surgery to improve a Male to Female Transgender womans looks, and make her look more like a natural female.