Generally the cheapest way is to have a friend or guild member who knows the pattern for it make it for you. To get it requires being Exalted with the Valiance Expedition, as well as some gold to buy the pattern.
The materials required which you can provide (buy/grind them) are: 12 titansteel bars, 40 Handfuls of Cobalt Bolts and 2 Arctic Furs. On most servers this will set you back between 1500 and 2000 gold.
The other materials are only available to Engineers who know this pattern, and must be bought at K-2 in the Stormpeaks. These are: Salvaged Iron Golem Parts, 8 Goblin Machined Pistons and an Elementium Plated Exhaust Pipe. These parts cost 12.500 gold, no discounts, they are always this price. And I repeat, only an Engineer can buy them.
So napkin math says that the cheapest you can get the mount for is 12.500 gold, assuming you grind the other mats yourself. This does not take into account that you actually spend your own time grinding them, so you pay for it in time instead of money.
Probably WOW, but Runescape will always work out the cheapest.
Do quests, farm ores/herbs. Anything, Just don't buy gold.
60
You don't - you can get an undead mount or horsemanship.
About 0.5%
it cant get low
like on madbid.com u can get them for £23.09 WOW :)
This sounds like the tiger mount that drops from one of the Zul'Gurub raid boss.
Either ZG tiger or Blue alliance Drangonhawk
Level one for the riding turtle vanity mount ( it offers no movement speed increase) level twenty for your racial mount, or BoA mounts.
Assuming you mean mounts. You need to have learned the mount by using the item they provide in the backpack. Then you open your spellbook and open the "mounts" tab.
Near the stables/hunter trainer in Orgrimmer.