Dear client,
It is advisable to mention all the relevant IPC sections in the FIR, but ultimately it is up to the police to decide which sections to include based on their investigation.
At this stage, it is best to lodge the FIR only against Vishal Gupta, the seller in the fraudulent sale deed. If during the investigation, the police find evidence against the buyers for criminal conspiracy, they can be added as accused.
Yes, you can file a complaint under IPC sections 445 for house-breaking against the unknown persons who broke the lock on your property.
If the SHO has refused to lodge an FIR, you can file a complaint with the Superintendent of Police (SP) or with the Magistrate under Section 156(3) of the Criminal Procedure Code (CrPC). If you fear that filing an application under CrPC 156(3) may offend the police officers, you may continue following up with the SP office for a few more days. If there is still no response, you can file the application with the court, and the court will direct the police to register an FIR and investigate the case.
Regarding the police asking for the original sale deed, there is no provision in the law that allows them to force you to submit the original document. You can submit a certified copy or a photocopy of the sale deed for their investigation. If the police insist on taking the original, you can request them to give you a receipt for the document, and make a photocopy of it before handing it over to them.