Good questions. Call in FP residency is less taxing than, say, surgical specialties, but really varies. During 2nd and 3rd years, there is a lot of call taken from home. Of course, this is a generalization. Depends on the individual programs. I interviewed at a place where one worked about 50 hours on an average throughout residency, and another where they had you on roughly q4-5 call for the duration.
As for #2, usually, in a small town, FPs are often the only doc in town, so hours can be rather long, but, the renumeration is much better, sometimes twice of what one would be offered in a metropolitan locale.
hth