The amount of habitats you are allowed is dependent on your level. If you are allowed 20 habitats, and you have purchased 17, it would say 17/20. You are at a level that allows 11, and you have 11, so it says 11/11.
Nothing. It speeds up time so all your other habitats will earn money and breeding/hatching will go faster.
You can't win in dragonvale, unless you consider collecting all the dragons a win.
All DragonVale hybrids are bred by picking two dragons of different elements to be bred with each other.
You can I play on my device all the time
DragonVale has not published any physical books. So far, all the books reference the game are in an e-format.
You either breed them or buy them with coins and gems
There's over 1,000 types it's almost impossible to know them all!
water earth fire air all in order
You can't. It's just to get more people to play Dragonvale. If you look all around the screen, never will you find a place to put a code. Hope I didn't make you feel terrible!
All dragons are full adults at level 7
Water, the sea, the Ocean all of these are habitats of animals.
Achevie all the goals given between level 1 and 9.