My cheeks have begun to get a bit flat and hollow with age and my jawline could also be refined. Are these things that can be fixed with a facelift?

Surgical intervention such as a facelift does not improve volume loss that comes naturally with the aging process. You may want to consider SculptraRadiesse, or Juvederm to improve the flat/hollow look. For jawline improvement,Ulthera (non-surgical) or lower face lift is available.