Chocolate Caramel Nut Salad

1 (5 ounce) package instant vanilla pudding mix

1 cup milk

1 (12 ounce) container frozen whipped topping

thawed

6 apple - peeled

cored

and chopped

6 (2.16 ounce) bars chocolate-coated caramel-peanut nougat candy

chilled and sliced

¼ cup seedless grapes