Taking OP at face value: If you're hurting for gold in WOW, and you don't have a maxed out character, have your toons have two gathering professions to sell on the AH. DON'T CRAFT, it uses up more money than it makes you for a long long time. Go Mining/Skinning, or Herb/Skinning.
Get as large bags as you can early as you can. keep and sell all the grey drops. Make a level 1 toon you run to a main city and park near an Auction House/Bank/mail box. If your bags are getting full while adventuring, mail all sellable items to your bank toon to list on the AH.
The Curse Client at Curse.com is great for installing legal addons to WOW. Auctionator, Mail Opener, and Grey Seller are what I use to help me make gold heaps faster and better.