I was wondering, Saruman lives in his tower (Orthanc) but where does Gandalf come from?
Is he just a Ranger-Wizard?
Saruman and Gandalf were actually Istari (wizards) named Curunir and Olorin respectively and they were sent along with three others of their kind, from Valinor by the Valar to overthrow Sauron. Gandalf didn't have an actual home or base of operations in Middle-earth, but wandered between the different peoples, preparing them for the upcoming confrontation. He was known in The Shire, The Lonely Mountain, Dale, Rivendell, Lothlorien, Edoras, and Minas Tirith, and most places between.