white, cream whitish

Yes its fine, i got mines done yesterday and its all yellowish whitish. one thing is keep using mouthwash or saltwater..it will take most of the white stuff off. remember the white stuff is just a bruise becase is been bashed around :)

clear whitish because of lack of blood vessels

Apart from their whitish appearance, they are the same as any other tiger.

Depends on the type of clay. For most, though, it is a whitish-grayish color. I have had clay that is snow white, so white is fine.