No mailboxes in the starting zone that I was ever able to find.
After looking at the vengeance set from the invasion, I went and grabbed the cheap arcane tomes and signets from AH then went and farmed more to get Scryers reputation up to exhalted for the tabard.
I've got enough herbs/leather etc. to max just about any profession - I've not decided which profession I want to do yet.
Since I raid mythics, I have gotten the BOE mythic boots from a trash drop (currently a bear tank)
I will more than likely craft and max three items, not because I really need them (leveled to 110 in beta so I know gear is easily replaced) but because I have the materials laying around and it will help a little bit for a level or two, plus I will more than likely do heroic or mythic raids if there are a couple of resets. Mainly because my guild will want me to level as quick as possible and well... nothing else to do really. I mean by level 104 on beta I was Ilevel 740ish. Hell at level 102, I had an ilvl 800 chest from a quest