I am interested in purchasing a Toto toilet for our house and I would like to know the following: 1. Are special adapters included for installation? 2. What electrical requirements are needed other than a wall outlet?

It comes with a 12" rough in, 10" and 14" rough in adapters are available separately.
There are no electrical requirements unless you are planning on using a washlet with the toilet, or are purchasing a Neorest.