Please remember it is [T24], not T24 or -T24- or t24 etc, that is needed in the subject line ;-)
There may be a T24 specific answer to this, but in the general case you start jBASE daemons like you would any other daemon on UNIX, via the init.d/rc.n system. You need a script that configures the environment variables, then runs the TCServer process. Check with your support channel though, as I would think that this sort of thing has already been configured in some generic startup for T24 daemons.
Jim