This video covers the Taming the Beast quest chain from the point just prior to Thotar gives you a taming Rod for your Dire Mottled Boar in Razor Hill. Thotar will provide 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 eventually an Armored Scorpid.

Once you've finished the taming Portion of The search chain, you will have to head to Orgrimmar and talk to Ormak Grimshot in the Valley of Honor in an effort to unlock your companion pet handling skills: Tame Beast; Feed Pet; Revive Pet; and Beast Training.

Finally, do not forget to go to the Pet Trainer and get useful reference the Pet capabilities that you will have to give to your companion pet.