you CAN chip it, mines single point injection like most 1.4s and mines chipped, its the carb versions you cant, but you can tune them a different way anywayz, and yours might be SPI anywayz
best thing i would do, get yourself an exhaust system, thengo down to hill power and get the induction kit, chip, and de-cat pipe
then let Nick take you for a drive to test the chip, an on the way back you get to drive, and you should definitely feel a difference
id stop there as far as tuning goes really, though you could get the cam package......
make sure your car is well maintained too, regular oil changes, fresh plugs, an make sure you have a fresh dizzi an rotar arm, an that your ignition leads are ok