Chin implant, buccal fat removal details. Will it make my face look longer?

Hello,i wanted for a long time to get a chin implant,but i have a question,this chin implant will make my face look longer?And i have one more stoopid question,if i get Buccal fat removal and chin implant,can i cut my hair in every way?like,u know,a round face cant get a buzz cut because this will make face to look rounder,so if u do this 2,can u?or a procedure that change bone structure to a square/rectangle face?