This video covers the Taming the Beast quest chain from the point just before Thotar gives you a taming Rod for your Dire Mottled Boar in Razor Hill. Thotar provides you with a number of 3 taming rods, every one is different and lets you tame beasts in the following order: Dire Mottled Boar, Surf Crawler and find this eventually an Armored Scorpid.

Once you've completed the taming Section of the Quest chain, you need to head to Orgrimmar and talk to Ormak Grimshot inside the Valley of Honor so that you can unlock your pet handling capabilities: Tame Beast; Feed Pet; Revive Pet; and Beast Training.

Lastly, do not forget to go to the Pet Trainer and get the Pet abilities that you have got to give to your companion pet.