All leg pulling aside. The 4 popper is not a power based unit, its geared towards economy.
Your path, short of replacing the engine, is a complete tuneup of all engine and driveline components. Steer clear of any modifications like big wheels or lifts. Don't jack around with the gear ratios. Believe it or not, the Toyota engineers have a clue when designing and building. Your chances of messing things up is quite high.
Things like "performance flash tunes" or CAI are mostly successful in making your wallet lighter.
I know this isn't what you wanted to hear. There are no miracles.