Fifteen inch wheels may or may not fit. Sometimes vehicles have 17, 18, or whatever wheels not just for looks but to clear the brake system components.
Also, in my youth I would always buy takeoffs from my local tire shop. Last set was bought off a buddy?s neighbor. He bought a new truck and at about 1,200 miles he did a lift kit and bigger wheels and tires. I think I gave him $150 for the full set of wheels and tires because he wouldn?t be using them and they were taking up space in his garage.