Tycoon is a shady company that is simply trying to get people to buy an addon that is a 'lite' version of a free addon that is actually better (TSM). The company behind it buys dislikes on YouTube videos from other 'gold-makers', refuses to offer support if, for example, your computer crashes and you lose your addon (you'll have to buy it again), and pays random people to praise Tycoon on YouTube with no personal use of it at all. Overall, just stay clear of Tycoon and any of its affiliates.
Cooking benefits all classes, especially melee and hunters (it is a free source of food). Until higher levels, the benefits it provides are almost exclusively stamina buffs. While more stamina is always nice, cooking is not essential to leveling. Considering the time investment required, if you pick up skinning then cooking would absolutely be a wise skill to level prior to hitting your level cap, as beasts often drop meat useful for skilling up.