Thank you for your interest in Pulse Secure products. 😊
1. Yes, that's correct. Pulse Workspace is not a separate appliance rather it's a runtime environment inside Pulse One.
2. Apparently, Yes. Pulse One + Pulse Workspace cloud offers 60 days trail license (Sadly, no trail in On-Prem) and subscription based license SKUs are available for both Pulse One and Workspace Cloud as well as On-Prem appliances.
Generally, Information like Pulse appliance configurations (XML), Logs, Health check statistics would be shared over SSL channel (REST API and DMI calls would be used).
Pulse Connect Secure Certified Expert