KDE Telepathy provides a suite of applications for a full instant messaging experience.
1. How do I add a new IM accounts
Open System Settings and select "Instant Messaging and VOIP". This will show you a list of new accounts. Click "Add Account" found in the top right and follow the guided steps.
2. How do I add a contact
Open the contact list. Click "Add Contact" in the toolbar. You will then need to select which of your accounts the contact should be added to and then enter the ID/Email Address of the contact you wish to add.