1 - I wouldn't say it because you're a non native English speaker/first timer to USA [non native English speakers are one of the most common things around here]. I would say it because things are not going well in NYC at all.
2 - That's fine, but don't get frustrated if you get something between 75K - 100K.
3 - Check Brooklyn and Queens, maybe Harlem. Commute is not a problem here.
4 - 25% to 27%.
5 - It really depends on your company. Don't forget the Fall and Winter's depression and loneliness. But don't worry, wait for the Summer [Oh yeah the Summer - Hellyeah!].
6 - I'm not sure.