Renji? No, he isn't part hollow so he can't get a hollow mask.
No.
Ichigo doesn't have his hollow mask in Shattered Blade but he does have it in Versus Crusade
you have to kill your hollow inside of your mind
No, She is a Human.
So far (atleast as far as chapter 399) it hasn't been comfirmed yet. Well Aizen did say when it was revealed when some he new had a hollow mask that he is to good for a hollow mask, he goes on to say that only a weakling would need one.
The YouTube video channel contains several tutorials showing how to make a hollow mask from papier mache. The eHow and Instructables websites also give information on how to do this.
Abarai Renji is 187.96 cm (6'2")
It's simply called a Hollow mask.
When a Hollow's mask is completely removed, their true form is revealed, which is a mindless and animalistic creature called a Menos Grande. The Menos Grande is a far more powerful and dangerous form of Hollow capable of causing significant destruction.
While I don't fully understand your question, I think the answer you're looking for is a "Vizard." In Bleach, a Vizard is a shinigami who has access to their hollow's mask and power. Basically,
Renji Ishibashi is 178 cm.
Renji Hospital was created in 1844.