Toolbars are fully customizable.

Right click on toolbar and select Icons and labels, for both text and icons.

Select Toolbar buttons… for window with all available option, drag and drop icons into toolbar or remove them.

There are 3 positions of toolbar – bottom, right and left. Just drop the button into position.

Recommended buttons:

Conversations for Nearby chat and IMs
Speak for Voice
People for nearby avatars, friends and groups
Map for finding places and teleporting
Inventory for access to your landmarks, clothing, notecards etc.