The paper dragon is a limited edition celebration dragon. It is only available until September 24, 2012. The red is egg with a brown company logo B in the front. It take 12 hours to incubate, and is breedable. Paper dragons contain four elements, which all must be present for the breeding to work.
Some successful combinations are:
Flower + Mountain
Lava + Evergreen
Tree + Blue Fire
You can only get a Paper dragon by breeding two Paper dragons that you already have.
You don't breed a Kairos Dragon in DragonVale. You have to get parts to complete it.
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 sun and moon dragon together
You have to breed a metal and a water 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.
There is no "marsh" dragon in dragonvale but if you are referring to the moss dragon the best way to get it is earth and plant, although you also have a chance to breed the tree dragon.
Earth Dragon and Cold Dragon