If Ice scales count, just go to dragesvard, go to that guy and go on random quest. In one of them, you fight a dragon and if you win, you get an ice scale.
No you can't buy a dragon,You do dragon missions to hatch your baby dragon.
u can buy one from the store or buy 1 online. if u need to go 2 the store, there are game cards.
you pay money to get a dragon amulet
you have to buy them from the lady celestia after you finish the fire orb saga