Hi Ananthi -
I'm guessing you have a self-hosted installation of ALMComplete?
1) Sorry, we don't have a multi-select custom field at this time.
2) and 3) When you host on your own servers, there is definitely some email configuration that might need to be done. There is some information
here about configuring email on your server.
4) Looks like a problem with the dashboard chart. We'll have to look into it - if you could make a "dummy" release for now you should see the data that you need.
5) There is a link to the Data Dictionary in the User's Guide - just click on Help Center at the top right of the screen, select either formats for the User's Guide and search for Dictionary
Hope this helps!