Bro,
Have you gone through the checklist of documents :
http://www.cic.gc.ca/english/pdf/kits/forms/IMM5612E.pdf
Its mentioned in this list that which documents need to be sent in original. Basically, all the forms, IELTS, ECA report, PCCs need to be in original.
Regards
IELTS, WES report, Reference letter from your company, proof of Funds has to be in original, rest all can be photocopies try to get then true copy, also go thru the checklist properly that will provide you lot of information.....Thanks.....