Getting ducks in a row for extension: how many copies of passport & which pages?

My last few extensions were done in other provinces so next week will be my first time in a few years that I've done anything at Bangkok/chaengwatana.  I think I've got everything ready but not sure how many copies of my passport they'll want, and which pages.   My default assumption is they'll want the ID page and any page with a stamp of any kind on it (for a grand total of seven pages), and just a single copy of all this.

If the above is true, can I scan all the pages and them piece the images together for printing out on a single page or does it need to be one scan per page (wasting a lot of paper)?

I'll need to scan my bank register too, so the same question here: just the first (ID) page and last?  Or all the ones in between too? Just one copy?

Thanks.