With these pieces you could make so many different outfits by recycling the different things and still have lots of different styles. This set has basically everything you'll need, or at least the template for it! The main colours for autumn in terms of clothes are: khaki (Deffo!), dark red, navy, browns/beiges and mustards. I.e. very dark colours or earthy ones.
For autumn, you'll deff want some print things as well as plain pieces. Collars, slouchy boots, big loose chunky knits, polka dots, skater skirts and snoods are awesome.
Autumn is where my style usually goes very vintagey and grungey/indie ish. The main purpose of this set was to act kind of like a checklist when I go to buy some clothes for starting college. Hope it helps you too!