Yes pets in PW have loyalty, it depends on how much you feed them. There have been run away pets before on the game. The more loyalty the have the more benefits you will get from them like 150% vs 50% of attack (or speed, its the same with mounts).
No, Only WFs (venomancer) can have combat pets. Though everyone can have an all calls pet which are just for show and can not fight.
I'm afraid only venomancers can hatch pet eggs but baby pets are available to all classes.
http://aqwwiki.wikidot.com/pets
A perfect world for me would be no world at all. Im not sure about Emos though.
Nobody knows at all nobody in the world Knows I'm a kid
http://www.wowhead.com/?spells=-6 has a list of all the Non-Combat pets in WoW
There is real pets all over the world FYI. Just kidding about FYI : D
Do you mean individual pets, or counting all of the pets owned by kids from around the world? Currently, there are over 2000 pets to choose from. But when counting every child's collection, the amounts are ever-changing. I'm guessing about a million+.
All of them
It is estimated that one hundred and fifty million people in the world have pets. This includes all types of pets, from goldfish and snakes, to cats, dogs, and horses.
All pets are domesticated creatures, so they are able to live in a home with humans which we call pets, cats first were pets and domesticated in Egypt and people would smuggle them out of Egypt and that is how there are cats all over the world.
yes they do there not like our pets but like donkeys and cows