You can call the console by "~" key and input all commsnds there.
Most of the game commands require cheat code activation, to do that use one of the followig commands (in console):
God X - be a God when X set to 1 and return to mortal world when it's 0;
ec.dbg levelupX - up character level to X value(no space at the end, i.e. ec.dbg levelup10 ups level to 10 points) ;
AddSkillPoints X - adds X amount of skill points;
Addgold X - adds X amount of gold and become rich and famous;
health - heal yourself
ai.killall - make mass murder;
kill - kill the target;
ec.ResurrectUnit - tried command from above or accidentally killed a wrong person in blood rush ? Not a problem! Go close to lifeless body, set target to it and use this command.
game.crash - never try it ! I warn you.
hero.AddReputation X Y - adds reputation for selected fraction.
Where X is a fraction number:
And Y is a count of points to add.
hero.AddReputation 2 100 - adds 100 points to England.