Need TIRES & RIMS for '05 OEM ACTION PACKAGE CELICA

Hi,

I i just bought my FIRST 2005 Toyota Celica GTS (ACTION PACKAGE)from a private seller and it needs NEW TIRES.

Im NEW to the whole TIRE & RIM scene and need some big help!!!

According to the previous owner, he had his Celica customed on the Toyota website and had the ACTION PACKAGE with the bigger 17" ENKEI RIMS that was a feature on the website according to what he told me.

The tires on the car are DRY ROTTED and need replacing, but i have no idea where to begin on SIXE and BRAND for a tire for this type of rim. Im the type of guy that likes everything FACTORY OEM on my vehicles, so therfor, here are my questions are... What was the ORIGINAL size tire and brand on the 17" ENKEI RIMS for the 2005 Celica's?
and where is the best place to buy them foe the best deal?

hope someone can answer ASAP. i need new tires lol, thanks!!

- KJ