When you have new toilet, and the old toilet has been removed from the room then it's time to get ready for the toilet installation. Spread a towel out nearby to set the toilet on when you remove it from the box. Remove all the pieces necessary and check to make sure everything is there and in good working order. Since your sewer pipe is exposed, it's a good idea to stuff a rag into it before you begin to keep the gasses from leaking out. You can pull this rag out at the last minute, before you set the toilet.

Remove the rag from the toilet's waste pipe, and set a wax ring down around its base. If your toilet didn't come with a wax ring, you can purchase one for a few dollars at your local hardware store. This is what will seal the toilet and keep water and gasses from leaking out.