2006 & 2012
Yes. Either Miami or Dallas will win the Championship.
They did not win the NBA Championship, the Chicago Bulls did.
No, he did not. He played for the Miami Heat in 2004-05 then signed up with the Cleveland Cavaliers the following year. Miami Heat won the championship in 2005-06.
The Miami Heat have won the NBA Championship in the following seasons:2005-20062011-20122012-2013