What is the fastest and easiest way to make money and level up in W.o.W. as a night elf

Learn to trade in the Auction House. If you can buy stacks of Bronze for 2G and sell them for 3G you'll get wealthy quite quickly. Other metals, skins and other ingredients are always in demand so just watch to see what's selling. Buy when there's lots of sellers. Sell when there's fewer. Besides that, you can buy them from a safe site, such as www.ugamegold.com