you should not look into super or turbo charging unless you upgrade the internal parts of the engine. when you super/turbo charge you raise the pressure inside of the engine and if the parts are not upgraded you will quickly blow the engine (you would be a little safe if you keep the boost low but then whats the point)
http://www.andysautosport.com/toyota/2003_9999_corolla/performance/intakes/cold_air_intakes/injen/ or
http://www.andysautosport.com/toyota/2003_9999_corolla/performance/intakes/cold_air_intakes/tradesonic/
http://www.andysautosport.com/toyota/2003_9999_corolla/performance/exhaust/cat_back_exhausts/borla/
http://www.andysautosport.com/toyota/2003_9999_corolla/performance/headers/dc_sports/
with more power you will need to replace your spark plugs to one with a colder range http://www.andysautosport.com/toyota/2003_9999_corolla/performance/ignition/spark_plugs/greddy/
http://www.andysautosport.com/toyota/2003_9999_corolla/performance/electronics/power_programmers/gtechpro/
