Which actor played George Bailey in 'It's a Wonderful Life'?

What is the name of the city Dorothy travels to in 'The Wizard of Oz'? In 'Citizen Kane', what is "Rosebud"? In 'Home Alone', what is the name of the boy left behind? In 'A Christmas Story' (1983), what gift does Ralphie want? In 'Elf' (2003), who plays Buddy the elf? In 'The Santa Clause' (1994), who plays Scott Calvin? In which film does Clark Griswold decorate his house with 25,000 lights? Who plays Clark Griswold in the 'National Lampoon's Vacation' films?