No.
The chapter is 'The Will Of Albus Dumbledore'.
Albus Dumbledore says "of course it is happening inside your head" in Harry Potter and the Deathly Hallows.
Yes, when Harry is in 'limbo' he meets Dumbledore and they talk.
Yes. He died in Harry Potter and the Half-Blood Prince.
Chapter 12.
Harry, Ron, Hermione, Voldemort, Severus Snape and Albus Dumbledore,
Toby Regbo will portrays young Dumbledore in the 1st part of the Deathly Hallows.
No, Dumbledore is dead. However his portrait hangs in the headmasters office and Snape often consults it.
The Life and Lies of Albus Dumbledore is a untruthful and biased biography written by Rita Skeeter.
Harry Potter and the Deathly Hallows Part One ended just after Dobby's death. The final scene was Lord Voldemort breaking into Albus DUmbledore's tomb and stealing the Elder wand.
In Chapter 7 of Harry Potter and the Deathly Hallows: The Will of Albus: Pressing it to his lips, a cryptic inscription in Dumbledore's handwriting
He comes back in a place when harry dies during hic sacirfice to voldermont they have a conversation and harry soul is brought to his body Dumbledore is dead in The Deathly Hallows. He reappears in the chapter called King's Cross as a spirit, where he and Harry talk about Voldemort, the Deathly Hallows, and Grindelwald. But he is definitely dead.