can the task priority be set within the body of the email like the date and time?
Unfortunately, a priority cannot be set when sending a task via email, but we will consider adding such option in the future. You're welcome to vote for this request in our Votebox: http://todoist.com/Vote/showProposal/66/
A suggestion is if you're using Outlook, to mirror the todoist priorities and colour codes set up by yourself in Outlook.
I'm doing this myself and run Outlook and todoist side by side with the plugin installed and it works very well - copy the body of the email to the todoist task and then set the reminder there and you will also get it to your phone :).