EXIT FROM KUWAIT

Labour law says you must give 90-day notice, regardless of your contract status, once probation has been completed.

If you give at least 90 days, your employer must release you, by law.

but i dont have tht much time wat if i go for vacation and i dint come back will dey put me in block list

If you resign from India without given him the 90 days notice, he won't give you NOC and i think you won't be able to work in Bahrain without it.

is der are any rules like tht compulsory i should get noc from the previous company

ask your future new employer in bahrain what documents they require from you here in kuwait.

The labour market in the Gulf is not centralized (yet). Technically, you would be a fresh hire for Bahrain. So, you could approach it in that way.
About the Kuwait job, people do resign due to unavoidable family circumstances. Can they bar you from Kuwait? Always a possibility.
HTH