In jidaigeki there are two types of characters: story characters and duel characters.
Because you are a beginner, open your duelchardata.txt file in Data folder, add a new line, then name your character using this: http://kkgc.forum-motion.net/t280-jidaigeki-remake-rename
0,ＫＵＮＩＯ, 0,50, 1, 0, 0,4, 200, 0, 0, 0, 0, 0,-1-54-,-,
Face - reffer to Face.bmp in Graphics folder, starts from 0,1,2,3,..,
Basis + PersonalityType + FamilyType - Basis is life, personality and familytype adds to punch, kick, jump, etc..
Comstyle - how the character reacts, in other words the entire A.I. Reffer to comstyle.txt in Data folder
Move - how the character moves on the map/stage
Money - pretty explanatory
Clothes + Skin + Line + Eye - reffer to colordata.txt in Data folder
BGM - music in BGM folder
Special - special moves, no limit in adding them.
Switch - I don't know yet...