Here is a guide to getting started with the pet battle system. main video will split off into Alliance or horde when asked to select your faction so you can see the initial quest lines and beginer tamers.
And here is a chart that I put together for Creature types Strengths and Weaknesses.
located here:http://internetkidzgaming.net/forums/showthread.php?976-Pet-Battle-Creature-Types-Strengths-and-Weaknesses