How to protect my ancestral property from my cousin brothers?

I am writing for my friend who is settled in Kerala. He is working at Lulu Mall in Edapally. For the past 3 months he was in his native Thiruvalla due to Covid 19 and lockdown. Right now, the landlord of the apartment where he is staying temporarily in Edapally is asking for rent, which he did not even ask for the past 3 months. Is there any sought of Legal way to deal with it? I have heard about Section 108 (e) and Disaster Management Act, 2005. With regards to any, can I have a positive deal with this?

Myself and my wife are joint owners of our house in Chennai. We need to sell it now. But wife is in abroad. How to proceed?

1) My grandfather passed away in 2011 and my grandmother ceased in 2019 leaving without any will. All property are in my grandpa's name except the two which were transferred to my father alone during his presence for bank loan purposes. 2) But my one of my father's siblings claims the ownership of other entire properties stating this transfer ownership after these many years. So, I have issued a legal notice for the land disputes and what is my next step ? 2) I need to file the partition suit and have to prevent construction/change of property nature of joint property. 3) Is property valuation and Encumbrance Certificate is much mandatory for partition suit as this is 70 years old land and having EC around 201x. What is next steps and documents required to owe the ownership of land and avoid the disputes.