Buzzer,
No one can doubt your enthusiasm but I hope you realise the actual budget for your project? If you have no timeframe or 20k sitting idle ready to go, its all good.
From what I know, the 2ZZ is a good little engine but to produce decent boosted power but is a very sensitive package where many guys with big budgets have experienced numerous failures. These engines must be prepared perfectly and tuned so, or you will break it.
Just focus on a tight chassis, excellent suspension, braking package. Go to some trackdays, driver training to see exactly where your skill levels are as this can save your life and put the idea of mad power a few years down the track once you have completely mastered chassis control.
Yes its a shameless plug, but come along to the MR2 Trackday Challenge in January 2015. At least you will meet up with 25+ MR2 owners and drivers in a environment where you can drive hard, watch and learn everything about driver control. It would be the best thing you can do. There are at least 6 circuit cars there with different spec's to see what you can do and what direction you could follow. Same goes for all the standard, mild and wild tuned road registered cars.