On what date is the President inaugurated after an election?

What is the call sign of any Marine Corps helicopter carrying the President? What is the name of the President's office in the West Wing? What is the name of the famous desk in the Oval Office made from the timbers of a British ship? What is the official residence of the Vice President? How many electoral votes are needed to win the presidency? How many total electoral votes are there? How many senators does each state have? How many voting members are in the U.S. House of Representatives?