Most of these are familiar titles -- Sentinel, Gladiator, Assassin, Marksman, Druid, Summoner, Archmage and Priest -- and the path to the chosen final class begins when you are a trainee. Choose the Apprentice (ranged/casters) path or Pugilist (melee) path to begin your journey toward the final class advancement.
While the roles are well-known, the abilities of each class make for some interesting possibilities. For example, the Druid is defined as a master of shapeshifting able to take on the natural abilities of wild animals, the Marksman has a range that is 50% greater than spellcasters -- something that makes for quite an advantage in combat.
Check out the Tales of Fantasy site for all the details on the final eight classes.