It should take an hour or less to install a new toilet as long as all of the tools and materials are available, according to Lowe's. The installation requires simple tools including a screwdriver, putty knife and an adjustable wrench.
The materials necessary for a toilet installation include a replacement toilet, which likely has two parts, and a wax ring. If the new tank is taller than the old tank, a supply line is necessary, too. Also, if existing bolts are broken or have rust or wax build-up, it is necessary to replace them. Before beginning the installation, make sure the toilet is the right size and turn off the water supply.