Unethical requests from the senior professors and chair I am a new assistant professor.

Everyday I meet a frustrating situations here for about 4 months so far.  Main matters are as listed below.  I really do not understand this situation.  Any advice or suggestions to protect myself just in case?  

1) without any credits, medical doctors want me to develop their research ideas (typically just have one or two keywords) and write the papers for them.

2) without any credits, they want me to analyze their data sets and write the results for publications.    

3) my chair asks me (only myself in this entire dept) to report my research progress every week in a small meeting - with the reasoning that they need to know all of my research studies.

4) my chair does not allow me to do any research studies myself (I must collaborate with a medical doctor).

5) my chair does not allow me to attend any conferences in medical education because I cannot be their representative.  

6) for the reason English is not my first language, my school doesn't allow me to teach/present anything here (I am teaching a class in a different dept now and have there been listed as an excellent teacher several times).  They ask me to support/do the other faculties' research studies.
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.