Wheels

I have found some wheels in town for sale. I have a few questions. They are 15x7, so I am not sure if they will cause problems. I also needed to know what the bolt patternt was, the wheels are 4 by 4.5. Wasn't sure if that was the bolt pattern for the Saturns or not, and I'm not sure how to measure those. It is a 96 SL2, any help would be thankful thanks

the wheel pattern is 4X100mm(metric), the 4X4.5in are SAE, they will not interchange.