There is a piggy-back fuel re-mapping computer called the Unichip. On a stock eninge or one with a few bolt-ons it will only net you 5-8 HP. However it is more usefull as a supporting mod for forced induction.
As for Supercharging, the TRD Supercharger fits on the 1zz-fe, so it should fit the engine. However the enigne compartment is to small on the 02 and below corollas so TRD does not sell it for that application. It is possible that it would fit with modifications such as a custom hood scoop to allow clearance, but so far I have not seen it done.