How to safeguard my wife & myself from my parents & my elder brother

Hello I got married against my parents wish & i have good source of income and i am independent living in different state far away from my parents due to my job. i have elder brother 6 year elder to me & married living with my parents he is presently jobless , after my marriage in 2019 he & along with his wife start jealous for my job due to which they have brainwashed my parents against me totally. He brainwashed my parents to such extent that before my marriage my parents has put up unexpected demand from my wife family for which i resist & i have given car to them to compensate there need. but things didn't stop there they keep disrespecting my wife & spread's rumors about her how bad she is. in 2019 they have also taken out in newspaper they due to bad behavior of my wife they have excluded from there property in which major hand played by my brother. now its being 2 year i start hating them like anything & they now not ready to accept there mistakes also still they keep spreading rumors' about my fight with my wife etc etc which is not true. they have start giving there property to my brother as he is become very greedy. What should i do ? firstly how should i protect my wife & myself from any allegation if they make in future? secondly How can i get my portion of property for my child as they are giving to there elder son ? thirdly My rights over ancestral property ? Fourthly How can i get price of my car back ( as it is my first car of my hard-earned money) as i given to dad name before my marriage to reduce there demand