HealthCover and Visa Issues While Moving to Abu Dhabi?

Hello,
recently I've been offered a position in Abu Dhabi with salary of 27000 AED a month by a Dubai Company, but no allowances, just medical insurance for self, entry/exit flight ticket for self
I tried to negotiate the conditions, but company is not willing to.
I would like to move to Abu Dhabi with my wife and 2 Kids (Kid1 - 4yrs and Kid2 - 3 month baby daughter) and I'm not sure if it's reasonable offer. Of course I would like to save some money also, not to spent everything on current needs.
Few Questions:
1. Residence Permit is from Dubai. Can I stay and work in Abu Dhabi. Will there be any problems during IJARA/IJARI/TENANCY CONTRACT execution.
2. Can I provide abu dhabi tenancy contract for dubai family visa as my (sponsor) visa is of dubai
3. Best Location or Apartment to Stay near to Hamdan Street (Office is located there)
4. I need to provide family health cover. Which is the best insurer and what would be the expense for the same
5. School admission for ICSE. Where and when can i get admissions.

A quick help can make things get into better shape. Hope everyone can help me be a part of your ABU DHABI FAMILY of EXPATS..... Thank You in Advance.

Bye