x2 what spence said.. Over the years many claims have come out about chipping the tC's ecu/ecm. None of them work, it's just a waste of money. Sad, but it's the truth. Don't fall for the wild claims of what these people claim they can do for the tC. No one has really built a standalone ecu or a piggyback system. You could always have a custom ecu created but it'll be more than a couple hundred bucks! Think more like $10-20k, no I'm not joking.
So save your money and don't waste it on a unichip. The only proven way for more power is really the basics.. Rebuilding the engine with stronger internals and turbocharging it! That's really it. It's not like this thing is a ferrari or a vette underneath and some magical part will make it a super car. It is what it is.. a re-tuned camry engine. It's good for what it is.