You are responsible for the care of the interior and you should leave it much in the same condition as you found it, although heavy cleaning need not be done. Because it is not a corporate venture, each place is unique. I did not see a pot holder, an egg timer, a spatula, or matches for the gas stoves. Be sure to ask the keyholder to show you the operation of the expresso coffee maker. Fully tiled modern bathrooms are almost universal.
Bidets are standard.
Some water heaters are small and will accommodate only one consecutive shower. Your American appliances, unless dual voltage, will not work in Europe. Italian plugs are three prongs in a row, but the two prong plugs used throughout Europe fit as well. Plug adapters are for sale in electric shops. Since the Italians voted against nuclear power, electric rates are astronomical.