In the star wars the old republic you will be able to play with different types of classes. Below you can find the abilities of the advanced classes. Each class has its different type of skill tree.
In the decades since the Great War began, a careful study of professional classifications, or classes, has identified several archetypes of great interest. Individuals belonging to these classes gravitate towards key roles in history-making events. Because of the likelihood that representatives of these archetypes will shape the future of the galaxy, a closer analysis of each class is warranted and is posted here for further study and discussion.
Galactic Republic Advanced Classes
Jedi Knight
Jedi Guardian Roles: Melee Damage Dealing, Tanking (Single Saber)
Jedi Sentinel Roles: Melee Damage Dealing (Dual Wield Sabers)
Jedi Consular
Jedi Shadow Roles: Melee/Mid Range Damage Dealing, Tanking (Double-bladed Lightsaber, Stealth)
Jedi Sage Roles: Mid/Long Range Damage Dealing, Healing
Smuggler
Scoundrel Roles: Healing, Melee/Mid Range Damage Dealing (Scatter Gun Wielding)
Gunslinger Roles: Mid/Long Range Damage Dealing (Wields Dual Pistols, Cover)
Trooper
Vanguard Roles: Melee/Mid Range Damage Dealing, Tanking
Commando Roles: Mid/Long Range Damage Dealing, Healing
Sith Empire Advanced Classes
Sith Warrior
Juggernaut Roles: Close Range Damage Dealing , Tanking (Single Saber)
Marauder Roles: Close Range Damage Dealing (Dual Wielding Sabers, In-Combat Temporary Stealth)
Sith Inquisitor
Sith Assassin Roles: Melee/Mid Range Damage Dealing, Tanking (Double-bladed lightsaber, Stealth)
Sith Sorcerer Roles: Mid/Long Range Damage Dealing, Healing
Imperial Agent
Operative Roles: Close-Mid Range Damage Dealing, Healing (Energy Blade/Rifle Wielding, Stealth)
Sniper Roles: Mid-Long Range Damage Dealing (Rifle Wielding, Cover)
Bounty Hunter
Powertech Roles: Close-Mid Range Damage Dealing, Tanking
Mercenary Roles: Mid-Long Range Damage Dealing, Healing