Average Utility Bills

We just bought our first Eichler and are very excited. We won't be moving in for a couple of months, but I've been reading a lot of posts about the challenges of keeping Eichlers warm in the winter and cooler in the summer. My questions are:

(i) what's the best way to use radiant heat? Turn it on in Nov and keep it on all winter at a steady single temp? Does it cost more when you fiddle with the temp (turn it up/down each day depending on the weather)?

(ii) what do you advise re use of space heaters for specific rooms (like bedrooms or bathrooms) for early morning/late night?

(iii) what are your average heating bills for a given winter month?

(iv) do ceiling fans help with cooling in the summer?

Thank you!