Good question. There are many factors to consider in estimating utility costs on a home. It is much easier on a specific home. Then you can ask the owner for copies of bills, or you can usually get info through the utility companies with owner permission. But remember, the costs will be relative to the habits of the family living in the home, as well as the number of residents.
In looking at houses in general you would have to consider, the age of the home, type and # of windows, type of insulation, type of roofing material, which way does it face, floor coverings, age of water heater, heating and AC systems. etc.
When you find a home you are considering, ask to see previous bills, that will give you somewhat of a guideline to follow.
Good luck to you,