How do I send a mass email to contacts on a Contact table(as a related list) located on an Account d

Ahh, the picklist of templates to allow the user to select the one to be emailed would be nice. Alas, I don’t think you can dynamically pass a template ID to a standard Salesforce workflow email alert (unless there’s some magic I’m not aware of). You might have to resort to using Apex to send the emails in that case.