turbocharge or super charge is not just something like adding a
hello kitty toy in your car..
its a big modification to do, and there are alot more things that
should be associated with, some must and some better to do...
overall, its to have the performance and should also do
turbocharge, intercooler, modify ECU, re-map the fuel and ignition
timmings, change cam shaft itself and timmings, exhaust headers,
catalyst converters, etc etc etc... the performance car with T/C
engine is not just different in turbo pump, but many others.
then u have higher performance, so u modify the engine and gear
mountings, gear ratios, suspentions and drive shafts, blur
blur...
and what? you car is sunny.... its more for normal city drive and
save fuel.
so instead of spending those, and being illegal, think of a
skyline.
cheers.. 
p.s. hay look below links... nice to read...
http://auto.howstuffworks.com/turbo.htm/printable
http://auto.howstuffworks.com/camshaft.htm/printable