From the time your baby is first born, up until they are eating solid foods, their diapers will likely be filled with runny poo and pee. Most of this will get absorbed into the cloth diaper and unless there it doesn’t absorb into the cloth, all you need to do is place the cloth into the diaper pail, and eventually into the wash. When your baby is having solid poo, you will simply scrape it into the toilet and flush. For this reason, it might be convenient to have your changing area near the bathroom with a diaper pail or wet bag in bathroom as well. Some folks use a diaper sprayer (a hose hooked up to your toilet's water supply) to spray the poo into the toilet. Here is a great video on what to do with the poo from NaturallyThriftyMom.