Hi.
Welcome to YT and happy to hear you have a new fur baby.
Cigarette smell not a good start, but glad he smells sweeter now.
Sounds like he is rather stressed in the new environment and that is why he is hiding, not eating etc. The nipping is probably fear related and as soon as he is settled in, that has to be addressed as I am sure you will do. Wont walk either!!! He is giving you a hard time,
But he will soon adapt.
Perhaps some chicken or yummy treats fed by hand might coax him into trusting you and eating? If he won't drink you might try getting water into his mouth by plastic syringe, as he should be hydrated? But he is obviously scared under the bed and will probably bite if you try to do anything with him in that state. Hope the treats help to get him out in the open and in a happier mood.
Good luck, but much patience will be needed here. Hope he was not ill-treated in his last home and you have to get over that history.