Which bus will i take from Martingrove and Finch Etobicoke, to go to Kennedy Road Brampton?

Take TTC route 36B west to Humber College. Take Brampton Transit route 11 to Steeles and Kennedy. You didn't say where on Kennedy Rd you are going, so you may have to transfer to another bus (BT route 7 serves Kennedy Rd). To go back, just reverse these directions.