I signed up for both days.. Don't think you will have any issues with warranty, this car is made for this stuff. And Scion promotes racing these cars with contingency programs etc. Just make sure to break in your engine before doing any track days etc..
I was the unlucky white fr-s that parked next to one of those flags, which fell down and dented my roof

But they are going to fix it at no cost to me which is good