In the Room of Requirement.
The order of the Pheonix
Hogs Head in Hogsmead
near the end of the half-blood prince book, after dumbledores funereal
Harry Potter and the Half blood prince - the 6th book
knock
with the magic of dumbledores testicles
Wand coloured.
In the Room of Requirement.
WHERE? IF you mean what is his patronus, I think it's a phoenix
If you are referring to the book: Harry reads an article about Dumbledore written by Elphias Doge; Dumbledores old friend. It explains a lot about Dumbledores childhood. After that harry reads another article about Dumbledore written by Rita Skeeter. This article explains more detail about Dumbledores childhood too.
Phoenix's feather - It is feather from Dumbledores phoenix Fawkes.
The order of the Pheonix
That's classified information.
Deluminator or put-outer which was given to him in dumbledores will
Dumbledore's pet phoenix is named Fawkes.
Hogs Head in Hogsmead