1. As we have title deeds (registered Will) & Assistant Commissioner, Konkan Division Court’s order in our favor, but do not have original title of the land (we have certified copy of same), can we show our ownership on the land & restrict the third person for having adverse possession on the land?
Registered will is not the title document, it has to be enforced through court by obtaining probate in the event it is objected by anyone having a vested interest in the property. What is order of the Asst. Commnr. Konkan division? What prevented you to not to initiate contempt of court action against the Thalathi who refused to obey the orders of the authority above him?
Why did you not approach a civil court to seek injunction agaisnt the thalathi restraining him from transferring the revenue records on a third person's name especially when there is a order by an authority to transfer the same on your name?
Why did you not obtain certified copy of the registration copy of the title deed from the sub-registrar's office instead of carrying an inadmissible photo copy of the same?
There are plenty of whys to be answered by you which are the solutions to the present crisis.
2. Can we do police complaint on the basis of registered will & order of the commissioner, and can we compel local police to file F.I.R. on the basis of same? Local police are not ready to lodge complaint at present since we do not have my father’s name on the records of rights.
The police cannot interfere in the civil matter. You have solution only in the civil court which you have not approached so far.
3. Can anyone tell us what legal rights we have since all public authorities like electricity boards or grampanchyat or police are not keen in helping us even after complaining them?
It is clear from your own question that the authorities whoever you have mentioned above have no rights to entertain any application from your side if you cannot prove your title.
A Will alone cannot become a title document, you have to prove the will by filing a probate case seeking grant of probate of will to prove your title.
4. Do we need to make this third person as party in our writ petition as well to get temporary injunction? Or will this third person matter get resolved once the high court orders proper rectification & mutation entries on my father’s name?
A writ petition also may not solve the issue because you have not exhausted the remedies available in the civil court before approaching high court with a writ petition.
Hence it is likely that the writ petition may also not fetch you the desired result.
You can approach civil court and seek proper relief and remedy to this issue as per law.
5. What all we can do immediately refrain third party encroaching & doing any development in the land?
An injunction suit in the jurisdictional civil court would help you render some reliefs.