Is there any way to disable TakeOver function in LFS server? It would just be faster to not implement it in my program

What do you mean by takeover? Disable reset car?
If so, in server config put this line:
/canreset=no
or if you're server admin, enter it when you are on server.

I tihnk he means where you swap cars with drivers, ie when they pit.

I think its only possible via an insim application.

I don't even think it's possible with InSim to be honest, you can't cancel car-takeovers. But OP, you would probably automatically get by with just holding the list of drivers and such, what needs to really be handled differently?

Yes I meant driver swap. I don't know how it works, that's why I ask. So you say I can just ignore it? And my program is InSim program if that helps

Yeah I don't think that there is a way to turn off Player Takeover using InSim, unfortunately. I had thought about that when i was working on my system but never found any info about it.

I dont know anything about insim, but it could be that theres some package sent when the driver's changed. And then you can do somthing like(i said, i dont know anything):

Its not turned off then, but you get spectated when you TakeOver. Just say that in your Welcome message, and i think thatll do it.

Yes spectating them for taking over a car would be effective, but without knowing his ideas and such it wouldn't be good to do that in say a league situation...