If one was to buy a World of Warcraft account one might research how to craft things. In the game World of Warcraft crafting items and other things is one of the hardest things to do in the game itself.
One can purchase max level World of Warcraft accounts from a site that offers the services of selling World of Warcraft accounts. One example includes "BuyMMOAccounts".
Yes, you need a Battle.net account to play World of Warcraft. A while ago Blizzard required that all World of Warcraft accounts be merged to Battle.net accounts.
World of Warcraft usernames are the email addresses that you used when you signed up. WoW accounts no longer use just single user names as all WoW accounts must be battlenet accounts.
No. Blizzard does not delete accounts on World of Warcraft.
World of Warcraft trial accounts do use the Cataclysm maps but you would not be able to access them as you can only level up to level 20 in the trial version.
No, you can not have more than one battlenet account on one licence of World of Warcraft. You can however, have more than one licence of World of Warcraft on each battlenet account.
There are no trusted sites to sell World of Warcraft accounts. Besides, you are not allowed to sell it. If you no longer wish to play World of Warcraft, then just stop playing.
ANY place that buys or sells World of Warcraft accounts is not legit. Buying and selling World of Warcraft accounts is against the AuP and ToS that everyone agrees to when they install, patch or upgrade the game. There is no site on the internet that can legitimately sell a World of Warcraft account.
Officially, Warcraft 3 (including the frozen throne expansion) came before World of Warcraft. You can check out the whole Warcraft timeline on the World of Warcraft website in the links section below.
ANY place that buys or sells World of Warcraft accounts is not legit. Buying and selling World of Warcraft accounts is against the AuP and ToS that everyone agrees to when they install, patch or upgrade the game. There is no site on the internet that can legitimately sell a World of Warcraft account.
There does not seem to be a limit on the number of accounts that you can have linked to a battle-net account.
Buying gold in World of Warcraft is against the terms of World of Warcraft and 90% of those sites are illegitimate. They are full of key loggers and other kinds of viruses to hack accounts.