Preheat oven: Preheat oven to 325 degrees F. Generously and thoroughly grease and flour a 12-14 cup Bundt pan. Set aside. Prepare apples: In a medium bowl, toss the chopped apples with 1 tablespoon flour until evenly coated. Set aside. Remove 1/4 cup toffee bits from package. Set aside for garnish.
Mix Dry ingredients: In a large bowl, whisk together the cinnamon, cloves, and nutmeg. Remove 1 teaspoon to be used later in the caramel sauce. To the rest of the spices in the large bowl, whisk in the baking powder, baking soda, and salt. Stir to evenly combine.
Make batter: Add butter and sugars to a stand mixer fitted with the paddle attachment and beat on medium-high speed for least 3-4 minutes (no less!), until light and fluffy, scraping down sides occasionally. Reduce speed to medium and add eggs, one at a time, beating just until the yellow disappears after each egg. Reduce speed to low and gradually add the flour mixture in thirds, alternately with buttermilk in between each third. Beat just until combined with a few flour streaks remaining, don't overmix. Stir in toffee bits in package and apples just until combined, then spoon batter into prepared pan.
Bake: Bake at 325 degrees F for 55 - 65 minutes or until a wood pick inserted near the center of cake comes out clean, You may need to cover the top of the cake with foil near the end of cooking time to prevent excess browning. Let cake cool in pan for 10 minutes. Remove from pan, and let cool completely on a wire rack.
Caramel Sauce: Prepare Caramel Sauce according to directions (below). You can make in advance and reheat in the microwave/stove or prepare when ready to serve the cake.
Serve: Spoon caramel over cake and garnish with remaining toffee bits.