I have a 99 Chev Malibu - there were 3 bolts (which is why I had a hell of a time getting it off. Persistance! I think 1 was at the back and another towards the bottom at the back.
5x115
With out knowing what you are working on we can not help.
I think 4 1/2 in. But a shop that sells WHEELS can tell you
Bolt pattern for WHAT???????