I would'nt bother adding parts to your car. As the car will lose its value quite fast, and competition at the lower level is rife, you will never be able to sell if you have body pats added to it. If your not interested in upgrading the engine, then i'd look at the handling side of things. That way, its a bonus when selling not a negative.
P.S. As all the guys on here will tell you, I am not a fan of Skoda, so maby dont listen to me! lol