Prepare cake batter according to package directions.
Pour into a greased 13-in.x9-in. baking pan. Bake at 350 degrees for 35-40 minutes or until toothpick inserted near center comes out clean. Immediately poke holes in the cake with end of a wooden spoon. Spread caramel and fudge topping over cake. Cool on wire rack.
Frost with frosting. Sprinkle with toffee bits and chocolate chips. Store in the fridge.