You can't breed these, you need to buy them with your coins.
Snow+Fog Snow+Storm
You have to buy it. It is one of the main base dragon.
You don't breed a Kairos Dragon in DragonVale. You have to get parts to complete it.
I'm pretty sure you breed an air with a cold, but I'm not positive
you breed a ice dragon with a mine dragon
You have to breed a plant and a fire dragon.
As of July 2012, there has not been a star dragon in DragonVale.
You have to breed a metal and a water dragon together.
You have to breed a sun and moon dragon together
You have to breed a plasma dragon with a salamander dragon.
Breed the earth dragon with the fire dragon.
To get a Smoke Dragon, breed a fire and air dragon together.