This video addresses the Taming the Beast quest chain from the point just prior to Thotar will give you a taming Rod for just a Dire Mottled Boar in Razor Hill. Thotar will give you a number of three taming rods, every one differs and allows you tame beasts in the following order: Dire Mottled Boar, Surf Crawler and eventually an Armored Scorpid.

After you have finished the taming Portion of the Quest chain, you will have to head to Orgrimmar and speak to Ormak Grimshot in the Valley of Honor to be able to unlock your companion pet managing skills: Tame Beast; Feed Pet; Revive click resources Pet; and Beast Training.

Last but not least, do not forget to visit the Pet find more info Trainer and get the Pet skills that you need to give to your pet.