First, how many PvP area's are there

where are they/how do you get to them, through PvP or regular PvE(quest side)

When I make a character in PvP I goto one arena that is round with a middle
court yard. Is this the only one on availible?????

How do you get to the hall of hero's????physical location or menu selection.

How do you get a guild Hall? I heard of going to lions arch and then to Hall island, but there are never any for sale????????

How do you GvG? are there spacific area's on the map to goto? Do you get there via PvP or PvE?

There are more questions but I can get by with thies for now.