i now strongly suggest that if you want to finish this project in time to use it then I ought to get on to details of how it is done.
WARNING: as you probably gathered this system uses electrical shocks, the current must be kept extremely low and the voltage used to power the shocker unit should not exceed 1.5 v . as this is remotely controlled there is no excuse for shocking someone in such a way that the current would pass through their heart or other vital organs/ nerves. i take no responsibility for what you use this for.
Step 1: MATERIALS
1 disposable camera
a project box to house it
a push to make locking switch
a remote control car ( it only needs the forwards function)
the remote for that car
a housing for two AA batteries in series