SOP in case of victoms car impounded by Police

Met with an accident, other party at fault (Hit my car from wrong side while I was taking a U turn). I lodged an FIR and asked to park my car in police station (I did willingly and gave the keys): 1. DO police need to give me receipt of my car being kept in the police station? 2. It's been 4 days no one contacted me for anything. They assigned a IO, who said he sent a report and my car wil have tech inspection and then I have to go to court to get back my car (I mean, I am not at fault, they kept my car and now I have to do all the follow ups). the taxi hit my car is nowhere in the picture, his car in not impounded yet> what are my rights to get the car back ? 3. My car is not insured for past 6 months. Am I liable or at fault by court of law? Note: I lodged a FIR to seek compensation for the losses (Car) and punishment for the drive for deliberate negligence, over speeding. 4. What is the procedure and communication: how I know the next steps, will police contact me and inform me on the court date/proceeding etc.. pls help I am clue less..