|I would suggest utilizing a text file for money, and for items.|
so perhaps ask the charactors name and create a folder
set /p user="please enter your charactors name: "
as the charactor picks up items you could add them into
this might enable you to store and recall.
depending on the set up for the user
you could change the title of the window to
TITLE %user% within RpG(or whatever)
or an echo with the main status screen? depending on how you have it set up.
I recommend reading up on (href="http://ss64.com/nt/syntax.html)redirection, for /f, echo. these are things that can be helpful when setting this up.