Suggest Treatment To Get Fair Skin

my face is oily. and day by day i is getting black in sun light. and also i am having dark spots of pimples of my face and also white spots . doctor said to me the white spot is on ur face is because of sun light. what should i do to make my skin again fare. please help me. my age is 25, and hight is 5.4. i am using sungrass sunsreen.