Take a hammer and smack the toilet, starting at the base of the tank. The trick is to crack the tank around the bolts (Image 1) so it will lift right off. Throw the chunks into the garbage can and then break them into small pieces.
To remove the bottom part of the toilet, smack it with a hammer at the base by the stool bolts. Do this on both sides. Wiggle the toilet free and then remove it to the dumpster. Be careful not to drop anything down the waste hole.
Remove any porcelain pieces that are left. Next, you will remove the wax ring and the bolts. The wax ring is actually made of beeswax so that it will stay soft, and it makes a good sealant for the pipe. Use pliers to pull the wax ring up (Image 2). If any wax remains, use a putty knife to clean it up.
Use a plastic bag that you fill with rags to plug the hole. This will prevent any gases from seeping back into the house.