
Wayne Gretzky played 20 NHL seasons, from 1979 until he retired in 1999.
During his NHL career he played for the Edmonton Oilers, Los Angeles Kings, St. Louis Blues, and New York Rangers.
His full name is Wayne Douglas Gretzky.
Yes. He later coached the Phoenix (Arizona) Coyotes from 2005 to 2009 and has worked in team and ambassador roles since then.
Yes. Gretzky represented Canada in tournaments like the Canada Cup and international junior events, though he did not play in Olympic hockey.