Welcome to the forum!
I am far from any expert myself, but I have spent some hours reading through this forum. Therefore I will try to point you to where you could start reading. Hopefully a more experienced member will chime in aswell.
Regarding what VCR you should get.
In this forum post, VCR buying guide
, you find some FAQ regarding VCRs and mentions of different models. Check it out and compare it with what VCR that are offered in your market (second hand naturally). There is also a marketplace in this forum that can have some VCR listings.
Connecting DMR ES-15
You should check out this post on Videohelp
. The author provides multiple links to other posts aswell.
Here is a guide on settings
on the DVD recorder.
You need a remote, although the settings can be accessed with an android phone with IR blaster as I described here
What country or region do you reside in? Do you have NTSC or PAL?