I came across this site (which I think is the official Kodaikanal site) which has some travel advice for tourists. No offence meant, but this page can have some editing.
First-Aid Kit should be taken with us.
While travelling in vehicle the diesel should be filled little above the need. In hill stations starting problem will occur. To avoid this it is better to fill the diesel there itself which contains some chemicals to prevent the starting problem.
To Make us happy the horses are sacrificing their life taking us riding. Is it a needy one