Press ~ during game play to display the console window:

Effect - Code

Add 100 lockpicks - player.additem 0000000a "100"
Add 100 skeleton keys - player.additem 0000000b "100"
Add 100 repair hammers - player.additem 0000000c "100"
Add 100 gold - player.additem 0000000f "100"
All map locations shown - togglemapmarkers
Change your gender - sexchange
Change your birthsign - showbirthsignmenu
Change your class - showclassmenu
Complete all quest stages- caqs
Spawn indicated item - additem <[item number]
Get indicated spell - addspell [spell number]
Give all spells to player - psb
God mode, if nothing is targeted - tgm
Force a level up - advlevel
Force skill level up - advskill [skill]
Free camera movement - tfc
List console commands - help
Kill selected NPC target; suicide if nothing is targeted - kill
Moves to current quest target - movetoquesttarget
Quit game immediately - qqq
Set player level - player.setlevel [1-255]
Set all quest stages - completeallqueststages
Set hair color - hairtint [red] [green] [blue]
Spawn indicated item - player.additem [item code] 1
Save game - savegame [filename]
Set fog start and end depths - setfog [start] [end]
Show sign selection screen - showbirthsignmenu
Show class selection screen - showclassmenu
Show quest log - showquestlog
Show current quest log - showquestlog 0
Show completed quest log - showquestlog 1
Show current quest targets - showquesttargets
Show name/race/appearance selection screen - showracemenu
Teleport - player.coc [destination name]
Teleport3 - coc [destination name]
Toggle full help - tfh
Toggle grass - tg
Toggle NPC conversation subtitles - showsubtitle
Toggle AI - tai
Toggle combat AI - tcai
Toggle no clipping - tcl
Toggle AI detection - tdetect
Toggle debug display - tdt
Toggle land - tll
Toggle leaves - tlv
Toggle menus - tm
Toggle fog of war - togglefogofwar
Toggle sky - ts
Toggle trees - tt
Toggle wireframe - twf
Toggle water - tws
Unlock selected locked door or container - unlock
Window with the full game scene graph - ssg