I believe you should deffinately ask ur vet. After all, that will be the person who'll put the shots on the cat, that should be the person that knows best.
ask a vet.. the shots will be have to be given and boostered so you need to start 1 month before going outside..
an indoor cat may freak out - I really really hope you are not putting it on a farm or something like that for a year.. it wont survive
here is an excellent suggestion for indoor cats going out...
If she's going to be outside, she should receive vaccinations for Rabies, Feline Distemper (RCCP/FVRCP), Feline Leukemia, & FIP.
You may also want to have her tested for Feline Leukemia & FIV.