You should carry a Legal Photo Identification (Eg: Aadhar, Driver's License, etc), Previous Medical Reports, Insurance Card if any.
The National Emergency Number is 112. This is one common number for Hospital Ambulance, Police, Women's Safety, etc.
No, it is not mandatory. You can pay the expenses out of your own pocket in the Hospital.
Yes, all the hospitals have an emergency ward to treat critical patients.
Patients have the following rights in a hospital:
* Medical Care during Emergency * Access Records and Reports * Non-Discrimination* Privacy * Informed Consent