you would just add them onto the phone as separate email accounts, they don't go through iCloud, so for gmail use google sync (if you just want email then just leave 'mail' turned on when you set it up and the rest turned off)
for your university email you will have to use their settings perhaps IMAP, for the settings you may have to look on your universities website or ask the IT department, some universities will not let outside email clients have access other than the webmail so be warned.