Hi folks,
I also received my ITA on Sept. 18 with 1018 points (got nomination from Ontario

)
For the passport/travel document, do I need to scan all the pages of the passport? or just the page where it has my photo, name, birthday, etc. ?
Upload exactly what is required by CIC. If they only ask for bio-data pages, upload just those. OINP wanted you to submit all blank pages for some inscrutable reasons but CIC doesn't.
and for the employment letters, is it okay to upload the letters I received in June this year? do the letters have to be dated after the Sept. 18?
Those would suffice. What you sent to Ontario can be safely reused.
also, I was surprised that they are not asking for other documents such as birth certificates, pnp confirmation letters, etc.
Birth certificate not required from PA/spouse/common-law partner. PNP confirmation letter not required because your points confirm that you've received the nomination.
thanks in advance