Wrong rims & tires

I recently traded in my 2004 toyota 4runner for a 2002 mazda p5, and it has the wrong rims and tires on it but it was missing the center cap to cover the lug nuts. When i was cleaning out the spare tire department, i found mustang covers that fit the lug nut cover. My question is, what is the right tire that will fit my mazda. Also if anyone has any stock 2002 mazda p5 rims that they just have sitting around, i would be more than happy to purchase! Thank you for an answers and replys.

Adam

Original tire size on the P5 is 195/50/16.

Clifton