At level 120.
No.
AM stands for ArchMage.Archmages are the 4th job advancement of Mages.There are two types of Arch Mages;-The Ice/Lightning ArchMage-The Fire/Poison ArchMage.
Yes, but it is not recommended.
You don't need it but if you want more skills or to spend your points you would normall advance. It is also the easiest quest to advance
the same guy that gave u the first job advancement
Go to Henesys and talk to Athena in the Bowman Instructional School. Do her quest and then you'll get your advancement.
no one knows but my guess is yes i am assuming level 170 for 5th job advancement
Go back to the instructor he would have some quests for you
Wait until you're level 30 and talk to Dances with Balrogs.
You talk to the NPC who gave you the quest and then go in a map when you talk to her. then fight the monsters and get your job advancement.
Go back to Nautilus Harbor and find Kyrin. She will lead you through the second job advancement. You can find her on the top floor corridor of the Nautilus.
i've never tried it so i don't know if you can.