File declaratory suit that you have 50 per cent share in the 2 plots of land and for setting aside fraudulent sale deed executed by seller
2) seek injunction restraining purchasers from selling the 2 plots of land
3) don t go in for partition suit at present
4) court fees is state subject and varies from state to state
5) you don’t have to implead sun registrar
6) file FIR against seller and purchasers for cheating , fabrication of documents ,
7) if police refuse to lodge FIR file private complaint before magistrate under section 156(3) of cr pc to direct police to investigate and submit report