Law / Poland's Work permit questions - visiting European countries; working in the EU / switching job; dependants [86]

I am a resident of India. I am planning to work in Poland on work permit. I am a IT professional. I have sponsore for my work permit. Can you please help me in answering following queries:

a) Can I visit all the countries in Europe with my Poland Work permit.

b) Can I work in all the countries in Europe with my Poland Work permit.

c) Can I switch my job in Poland or other countries in Europe

d) Is there any condition for my dependants(wife and child) to accompany me in Poland.
Is there any condition like I need to be in Poland for 2 yrs., only then my dependants can join me.

Thanks in advance.