Press [~] during gameplay to display the console window. Then, enter one of the following codes to activate the corresponding cheat function:

help - List console commands
tgm - God mode, if nothing is targeted
tcl - Toggle no clipping
tfh - Toggle full help
lock <1-100> - Lock selected door or container with indicated lock level
unlock - Unlock selected locked door or container
kill - Kill selected NPC target; suicide if nothing is targeted
coc  - Teleport
modpcs ,  - Add indicated amount of points to specified skill
modpca ,  - Add indicated amount of points to indicated attribute
player.setCrimeGold 0 - Lose bounty
player.setPCInfamy 0 - Lose infamy
player.additem  1 - Spawn indicated item