A couple of questions for you. Are you on a BES? If you are on a BES, then you will need to have the Admin set up your account. If not, then you will need to set your Email up on your BWC (Blackberry Web Client). What Service Provider are you on? AT&T, Cingular, Nextel, Etc? Example: I log into the BB Web Client and set up the client to grab my mail and forward it to my BB. Then when I get home, it pulls that mail to my Outlook Client.
For Ramble, use this link BlackBerry IM Chat Apps/FAQ - MSN/AIM/ICQ/Yahoo/Google [UPDATED]
to get all the information on CHAT APPLICATIONS you will need. I hope this helps.