above des cornas where three horses are and you can also find the unicorn there
you have to finish all of the undead unter missions before you can find him.
at fort mercer
Gaptooth ridge
You can find tomahawk ammo by searching through undead bodies when they are dead, and by going to boxes which refill your ammo.
in gaptooth breatch and el materdora
The retcher, Bruiser, and Bolter, along with regular type.
It's in the same place as it is in the original Red Dead Redemption. In mexico
You must finish all the Undead challenges in order to get the Chupacabra
No you can't there is only one in the game.
anywhere
No, you can only find it once I'm afraid