induction and exhaust will make it sound like its faster. but to be honest youd be spending a fortune to actually make go any accelerate quicker.
not to mention the increase in insurance premium for what you get back.
one option would be to strip out what you dont need. spare wheel and tools, boot carpets and sound proofing, engine covers and sound deadning. itll not be much to the point youll probably not notice it but it might make a small difference
there was a guy on the mk4 forum that was turboing the 1.6 - more or less the same engine as the 1.4s - last i seen he had it running, wasnt exactly reliable if i remember and only made around 140bhp
like i said in my 1st post its not what you want to hear but id save your money and save for a new car when youve got a bit of NCB.
some nice alloys - more weight however so will accelerate slower, nice little drop and an induction kit if you want a little noise, and tint the rear windows. and id leave it at that .