OUCH! You got screwed by this person. Anyway, welcome to BlackBerry world. You've come to the right place for help. As a 4 1/2 year user of BlackBerry, I can answer a few of your questions for you.
For a good introduction to BlackBerry, visit this site http://www.discoverblackberry.com/
. There is a tutorial for you to view to get started using your BlackBerry.
I am not on a BlackBerry Enterprise Server but yes you will need to be on a hosted BlackBerry Enterprise Server to share info because only Microsoft Outlook on an enterprise server provides this ability. I would look into that 3 months unlimited access for free. I am sure there are plenty of Canadian Bell BB users here to inform you more about this and their BB data plans. To share call lists and/or make calls using your BlackBerry, u will need a voice package with the most amount of minutes u can afford.
Also, there are plenty of reasonably priced BlackBerry apps for medical professionals. Try looking on http://www.handango.com
. It will ask you to select the type of BlackBerry u have (and yes 8700's have been added to their list of supported BlackBerries). Then it will take you to every application available for BlackBerry. Then go to Applications and find what you all need for a reasonable price.
If you have any questions, please feel free to message me using BlackBerry Messenger which you can download at http://www.blackberry.com/messenger/entry.do
. My PIN number is 23cf4be6. There is also a user guide to show you how to use this. Good luck and prepare to become addicted to them outside your professional life.