Utility bills vary from country to country and even from city to city within the same country.
To have an idea of how much your utility bills can be, we recommend using Numbeo. Simply choose the city you'll be living in and check the "Utility" section.
Some listings on Uniplaces have some or all of the bills (water, electricity, internet and gas) included in the monthly rent.
Some landlords also prefer to establish bill caps. A cap means that the bills are included in the monthly rent only up to a certain value. If the utility bills go over that value, you will need to pay the difference. Some landlords prefer to deduct this difference from your security deposit at the end of your stay. To learn more about bill caps, read this.
You can check information about utility bills in every listing here: