Here in the same county, a friend of mine had an large, older ranch home, built in the 50's, on a gorgeous piece of riverfront property (in a very desirable, upscale, neighborhood), that still had the original electrical meter , and the power cable /electrical feed coming into the house right next to the front door!!!

Everything is assigned electrical wise to the tenants so there is no owners meter.

I have already checked with the city, and there isn't a process for checking the readings online or anything, so my only option would be to drop by the property and look at the meter myself.

Most duplexes have a third meter for the landlord.Second, if you must use the tenants electricity, simply give a week or two notice and let him know you will be compensating him for it.

Are there any shared or house meters?

Use a moisture meter $20 at HDepot to check it.

Even in buildings with landlord supplied heat they all have their own gas meters.

We have a meter and are monitoring the moisture.We got our permits for all three houses pretty quickly, they're taped up in the windows already.  

Public water, not sure if separately metered.

So, let's count in present condition: let's say water/sewer $3500/year (Cleveland water charge double from the buildings and these units won't be metered separately).