IRCC will ask again for police certificate. They cannot retrieve it from your visa application. However, if your previous lawyer has a scanned copy of your old certificate in her files you can use it. Worst case, if you get AIP and reach Stage 2, you will ask for exemption from it but you will need documented proof that you cannot get a new one. Don't worry about it now - the AIP is a real problem here, PCC is of little importance.
For remittances, she probably wants to demonstrate that you are supporting your family back home (which will be your HC argument too). If you don't have receipts, then you don't have them. Try gathering support letters from people back home attesting to money support.