The console can be opened with the ~ key under Esc.
Here are the various cheat commands.
dlgAddItem(item_id, quantity)
dlgAddRank(x) ;range from 0 to 58
dlgAddSkillPoints(x) ;adds general skillpoints
dlgChangeCharacterHP(x) ;negative value to decrease, positive to increase
dlgChangeMaxAP(x) ;negative value to decrease, positive to increase
dlgChangeMaxHP(x) ;negative value to decrease, positive to increase
dlgChangeMoney(x) ;negative value to decrease, positive to increase
dlgChangeRep(rep, x) ;bodycount, honor, daratan, aurelian etc.
dlgChangeSkill(skillName, x) ;can't go past 10, use negative value to lower skill, skill names are general, like dodge, dagger etc.
dlgChangeStat(statName, x) ;str, dex, con, per, int, cha
dlgChangeTraining(skillName, x) ;dagger, dodge etc.