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.
We recommend using decimals e.g. 1.3 as this makes the line height relate to your font size.
Yes, you can use Drupal fields in certain parts of Acquia Cohesion.
You can create more than one template to provide layout and style alternatives with the use of the template selector.
It depends on the use case. For fields and their field formatters use a 'Field' element, for data without field formatters, use a token.