Just racial abilities in the support ability slots (second half of the action bar), these are not available in structured pvp but in WvW/PVE. Some are elites and can be pretty fantastic (shapeshifting etc).
Not a trait thing which atm is being totally redone and not shown yet though. As far as it is known traits are what helps create builds by augmenting abilities making them change a good bit. you do slot/equip skills in the last 5 slots of your bar though.
Starting areas and storyline are totally different per race also. There is also different racial gear exclusives.
XI Wiki



