Unethical requests from the senior professors and chair
It sounds like there is such major lack of understanding regarding your job that you need to have a discussion with the Department Chair. You need to come away from this discussion understanding how and when your performance will be reviewed, what you need to do to either have your contract renewed or get tenure, and how you will be able to do that. Hopefully this conversation will resolve the issues, although from your description it does not sound like it will. More likely, you are going to need to meet with the Dean as you hand in your resignation. You should explain to the Dean that you did not fully understand the position when you took the job and that the expectations and behavior of the department are wildly inappropriate.