I did dailies, with 2-3 teams for quite a while... basically funding alchemy across six teams. That got rather boring, incredibly fast.

Boxing can make you gold, but passive income from transmutes or the like, is probably the best approach to making gold. You could also cover each of the major tradeskills, and pick up recipes to create whatever the best purchasable gear for a fresh 80 (85 in Cata) is, along with whatever the best craftables are for the current content. Just running heroics/battlegrounds for gems and DE mats is decent too.

I wouldn't box, for gold as the motivation. But if you enjoy boxing, gold is a very nice side byproduct from having so many cooldowns. Play teams/compositions that you feel are fun. Definitely take advantage of Recruit A Friend (RAF) when starting.

You might consider something like:
A: Strong PvE team.
B: Strong PvP team.
C: Melee team (or Caster team), whichever you didn't go with as your main team, for the aspect of the game you enjoy the most.
D: Mixed team, fun to mess around with.

Easy to get four teams to 60th, in three months of RAF. Pick whichever seems the most fun, and play them most of the time, but bounce around a bit to always be playing with rested. Mix it up, maybe to tradeskills for a bit, then level via quests or battlegrounds or instances, etc. Keep it fresh...