Medical proofs

1) i have original medical bills, few medical test reports. i am going to produce them as evidence in originals to court. at what stage i should do it?

You can file these medical bills exhibits , tests reports durings cross of your wife, else you can file the same during defense evidence.

2) also, my wife took originals like doctor's report, prescriptttion mentioned by doctor, some other test report with her when she left my home. however, i have all the xerox copies of the reports. Please advise if these xeros copies when submitted will be accpeted by the court. will the court be convinced that my wife had originals and i am having only xerox copies?

those xerox can be used as MARKs not as a exhibits , (marks have less value then exhibits), But whati suggest id during put these xerox as a mark and later summon the Doctor during defense witness