Inheritance of property after death of father

My father passed away recently. He had a 3 storied house that he has left for me and my younger sister in his WILL. As per the will, both myself and my sister are joint executors of the will and we are planning on jointly filing for probate of WILL. A tenant is living in the ground floor of that house since 1978. The tenancy contract was between my father and a certain company. Now the current owner of that company is staying in the ground floor of the house. The tenancy contract has a starting date but does not have a ending date. My questions are : 1. After me and me sister gets the probate of will, does the previous tenancy contract between my father and the company become void ? After my father died, and me and my sister got to see the WILL, we had asked the tenant to move out, but he demanded a large sum of money for the same. After me and my sister received the probate of will, can we legally ask the tenant to move out. Can he refuse ? What are my options, in case he refuses. 2. When my father was alive, he had filed an eviction case against the tenant, but the case got dismissed since my father was unable to go to court due to ill health. The tenant has been depositing rent to “rent controller” since then. Even after the case got dismissed, he still kept paying the rent to “rent controller” and not to us, even after we asked him. How should be my next steps ? 3. My sister asked for my PAN and AADHAR details while applying for the probate of Will. She stated that her lawyer had instructed her to do that. Do I need to share my PAN and Aadhar for filing of probate of will . 4. Recently I have learnt that my late father also owned other land and real estate, that are not mentioned in his WILL. I have found TITLE DEEDS and SALE DEEDS for some of those properties. I was unable to locate those properties online. I had found a person who specialised in “Searching” for trail of property documents from government offices, but he said that right now, no “Searching” is happening due to COVID. Is it true? What steps do I take to learn about the current state of those properties. 5. As other than the 3 storied house, none of the other properties are mentioned in my late father’s WILL, how do we legally claim those properties.