Elimminating Unnecessary Staves/Making the piano part bigger

So, most of the time my questions are answered by scrolling through former forum topics but this one I can't seem to find and it's getting to be rather frustrating.
You see, I'm arranging a piece for violin, voice and piano, and you all know how when there's a bit of an introduction before the voice comes in, usually the voice stave simply isn't present until the line on which it actually begins. It saves space and looks neater. I tried hiding empty staves, but the difficulty there is that it hides ALL empty staves not merely the ones at the outset. Failing that, I attempted to manually hide the measures at the beginning one at a time, but the line which connects the staffs together was still protruding up into empty space where the voice measures should have been and it didn't eliminate the space those measures made, anyhow. I hope that description made sense, I'm at my wits end and could use any help.

  One issue more. Do you know how usually the piano part has the other instruments with it, but they're in smaller staves and notation just so the pianist knows what's going on and how to best accompany other instruments? Is there a way to do that here? I can't seem to find one.