To enable the cheat console, start the game with -console parameter added to the shortcut command line. Now press "~" to bring up the console. While in the console, press any key to list all commands which start with this letter. Use arrows on the key board to scroll up and down this list and to choose a command.
freecasting: do not lose blood
blood #: set points for your blood pool
giftxp #: set number of xp points
give item_a_name: get armor (select any name)
give item_w_name: give weapon (select any name)
god or godmode: enable godmode