Usually it's best to avoid a lot of instance runs. It is too difficult to account for bad groups, and some instances are too far away with too few quests. Since the experience is very good, it's a good idea to clear nearby instances which have a lot of quests once (Gnomeregan, Deadmines for Alliance). Distant instances with few quests should be avoided (Deadmines for Horde). Low level instances can be cleared by paying or befriending a single high level character. However, since patch 3.3 a new Dungeon group finding system has been implemented, as well as a direct port to dungeons (when entering the group you get ported to the dungeon and back to the same location if you leave it) and thus the travel time to dungeons has been greatly reduced. This makes it a good idea to complete quests or grind while you wait for a group to become available.
Some people have made arguments that quest blues can sometimes be more powerful than heirlooms, especially with sockets. I'm not convinced. The simple fact that you never have to even look at quest rewards will save a non-insignificant amount of time over the course of leveling. Also of consideration is the value of enchanted gear never having to be re-enchanted.

There are also numerous gold-making guides available for World of Warcraft players. Currently mmobux recommends Killer Guides' World of Warcraft Gold Guide, which covers a broad range from daily quests and professions to making gold while leveling and auction house trading. 'Standard' farming spots are covered as well, making it an interesting resource for bots as well. Yielding up to 500 gold per hour, the strategies are suitable for players of all skill levels. If Killer Guides keeps the guide up to date, it probably will become a valuable resource for professional farmers as well. There also seems to be a German-language version available: WoW Gold Guide (German) 

For your tank... I'm assuming you meant which race should you be, not which class, since you seem to want to be a warrior! Well, if you were Horde side I'd recommend Tauren for the health buff. But honestly, I *never* pick a race based on the racial features - only based on the flavor. If you are going Alliance side, I am quite partial to dwarf warriors myself but pick whatever seems most fun to you!
Fish, meanwhile, were significantly devalued by the Underlight Angler, an artifact-quality Legion fishing pole that made fishing so productive that a very small number of fishermen could supply an entire server with materials for cooking. At current rates, fishing in Battle for Azeroth is more time-consuming, which means less food to go around, and higher prices at the auction house. Of course, Blizzard could change spawn rates in a future patch, but as of now, signs point to an economy in which common necessities will be much more scarce.

One useful data point is the cost of gold from illicit services. The WoW Token has taken a bite from their business, but these people are still out there, botting trade goods and stealing and pillaging accounts despite Blizzard’s continuing attempts to ban cheating accounts and confiscate illegal gold. The going rate for gold from these outfits is about $15 per 100,000 gold.
Gold sellers would steal players’ account information using keylogging malware and phishing scams, so they could strip characters and harvest everything of value. They used stolen accounts and the accounts of players who had paid for “power leveling” services to “bot” for resources, using automated cheat programs to harvest resources that they could quickly liquidate on the in-game auction house. This caused the price for traded goods to crash, which impacted the entire economy.
Anyway both got to 110 at around 50h played. I messed up with my Pal by going to Legion once I hit 100 instead of finishing treasures and bonuses in WoD. All in all, if I picked the best zones and was only trying to level as fast as I could, I would probably could have done it in roughly 40h. Note that it would have a been A LOT faster with a Monk as both Ret and Rogues don't really have a decent AoE until 40+ (45 for Ret and 63 for Rogue I believe). The daily also helps a lot. I know that leveling my Monk before the pre-patch was insanely fast. Might be slower with the changes to FoF, however.
Was doing it at 52 on my lightforged paladin and it was easily the slowest zone out of the ones I'd done. Granted, I didn't have War Mode on so I didn't have any PVP talents, but it felt like about 40% of my time was spent waiting around for respawns or wandering around looking for mobs to kill to get a quest item that had like a 5% drop rate. Maybe I just got unlucky but I definitely won't be going to that zone again for future heritage armor runs.
How many hours will players grind for a token now worth $15? On the Chinese and European servers — which include Eastern European countries where minimum wages are less than the equivalent of $2 per hour — there are plenty of people willing to sell their time for these prices. There is more of a question of relative value in North America, where players tend to value their time more highly relative to subscription costs.
I made one for my guildies but its for the Horde leveling process. One tip that goes for both factions is that you dont need to do all 3 zones to hit 120. I did like 1 and than three quarters of another. But once your 120 you need friendly with all 3 of your factions new reps to unlock world quests so make sure you hit at least friendly with all 3 while your leveling.