Do I have to use IMCE?
No. Acquia Cohesion allows the site builder to select, either use of IMCE or Entity browser for browsing and selecting images.
Acquia Cohesion renames to Site Studio from version 6.2. Tell me more.
There is no known SVG module that can be used with Acquia Cohesion.
You can use Elements to create content but we don't recommend doing so for multiple reasons.
Custom styles are CSS styles for classes.