1. First Presales contact process bugs as it sends an email with no clickable link so we can't validate the presales question.... so here am i.
I am not sure I follow on the issue here, but I will pass the concern to the DEV Team so they can look into the "Free Consultation" workflow and process.
2. I would like to make sure the whole toolset package is usable with jreview plugin hidden link and its theme ireview hidden link.
Toolset is compatible with almost every theme and plugin as long they are coded by WordPress standards.
Here you can see some potential issues:
https://toolset.com/home/compatibility-toolset-plugins-themes/
I cannot test those Thems and Plugins, but I shortly reviewed them and see that for once, the Theme comes with a Layouts Builder, so eventually you will not use Toolset Layouts.
Also I see the Plugin provides Forms, so you would probabyl not need Toolset CRED.
You can still use Toolset Views (to display Data), Toolset Access (To control who can see and do what) and Toolset Types, to create new content Types.
3. If you are not satisfied with Toolset after the purchase, you can get a full refund within 30 days - no questions asked.
4. By the way, Divi is supported, so i believe it's the same for extra theme hidden link, correct?
This integration is for hidden link
I am not sure about the "Extra" theme, as we do not provide a explicit integration with it.
If "Extra" is just a child of DIVI, it should work.
The integration anyway is mostly for Layouts, and it will still work even without integration, it's just that some things (like integrating our Toolset Layouts plugin) are much easier (automated) with the integration.