Follow bwood87's plan and your set. Suggest that you get the S/C install before anything else. Better to keep the Dealer unaware of your extravehicular activities.
Good synthetic oil is a must. We have very knowledgable members on here that have solid experience with tweaking an building cars. They will get you steered in the right direction.
To answer the earlier questions:
1. Stock injectors are 380CC (I believe but can't find the reference yet)
2. TRD S/C injectors are 440CC.
3. With the TRD, boost comes on quick with the pedal. Smack the pedal and you go from 17-20 inches of mercury (cruise) to whatever RPM/boost that you are at. There is no lag but you are not at max boost till you hit redline.
4.
http://www.club-tc.com/forums/perfor...s-more-hp.html This sticky is a good place to start for what works the best for the money and performance.
5.Brian Crower Cams is supposed to hit the market with new billet cams for the tC in about 4 months. Darn they beat me to the punch.