The Purple Cats are accessed by a mini-quest that you unlock after Swept Away and Gertrude's Cat.
Purple cats can be created when you bring Wendy the Magic Unguent.
Purple cats can't be reversed. Other cats can be obtained from Gertrude' more info: Link below
No, purple fur does not naturally occur in cats.
You can get them at Canfis
If you die a cat it can be purple!
no it is not normal for cats noses to be purple they are either black,brown,or pink
At the barber shop in Falador.
no you can not.
You find cats in Runescape by either looking at other people's pets, or doing the quest "Gertrude's Cat" and buying one yourself.
That they are in your clan/friends chat.
No but some cats look blue
The apothecary in runescape is located in southwestern varrock. it has a purple potion icon over it.
im pretty sure not