From the Newe Brunswick train station it would be about a 15 minute walk. Just go downAlbany Street too the corner of George, Turn right and then walk about 7 city blocks until you come to the intersection with Livingston Ave. Make a right and you will see the Theater Marquee about 500 yards ahead. But there are also plenty of cabs at the train station if the weather is cold or damp. It is actually a nice walk. You will pass Starbucks, some nice bars, a couple of good eating establishment, /dunkin Doughnuts and a great pizza place. Once you turn right on Livingston you will pass the George Street Playhouse and the City Monument Square

I honestly do not remember who performed. Usually in Nov and December they have various holiday performances.

Street parking if you can find it. I always park at the nearby parking garages. Both are about a block or 2 away. The one I park at is $13 paid at the theater prior to the start of the event. Check the State Theaters website for parking options and maps.

Around the corner in the public parking.

I had seats on the floor, so didn't use them, but they looked like your standard B'way theater stairs. I wouldn't chance it

Downtown New Brunswick is right there. I would say that just about any restaurant you google will be within a block or two of the theater. Try The Frog and The Peach or The Old Bay Restaurant. Both very good. About two blocks away.