If you could take a photo and upload it to like Imgur and drop the photo link here people will be able to better advise you :)

If you get an old enough vehicle, it will change its oil on its own. You just have to keep it topped off is all lol

Unless you want replace your floors as well, replace the toilet. If the tank fails when you are not home the autofill valve will just keep trying to fill the (now broken in this example) tank until the city runs out of water.