Adding Pager to entity referenCED field display
There might be better way of doing that.

But one of the way will be to use views module

Answer to question 1:


Go to your_site/admin/structure/types/manage/content_type/display
Change the reference field format to Rendered entity
Click the setting and make sure Show links is checked


Answer to question 2:


Install the module views if you don't have it already
Go to yoru_site/admin/structure/views/add
Give your view name for example read more button to parent content type
Unchecked Create a page and Check Create a block
Click Continue &amp; edit
Change format to "Table"
Click add filed and select the fields you want to show
Click add Filter criteria and select the criteria you want
Click the Advance and Add Contextual Filters
SelectContent  Content: Nid"
Select Relationship as content entity referenced from your_xyz
Change the option for When the filter value is NOT available to Provide default value and select Content ID from URL.
Change When the filter value IS available or a default is provide to Specify validation criteria and select Content from Validator select field, and select the parent content.
Make sure Filter value format  is = to Node ID
Make sure Action to take if filter value does not validate is = Hide view
Click Apply
Add a Relationship, Click add and select Entity Reference
Click Save.
Go to yoru_site/admin/structure/block, search for the new view name black you just added.
Click configure change the Visibility settings  to content type and select the parent content type.
Set the Region where you want the black to be display.