L/C 100 Turbo Timer/Chip kit

Just drove to Southport from Sydney last weekend, picked up a 2003 L/C Turbo Diesel, loaded with heaps of ARB stuff. Only done 37K kilometres, like new, never been offroad. Bloke's missus didn't like the vehicle so it got sold. I am stoked at how good it went on the drive back to Sydney. I bought it to tow a 25'Jaco Van & do some offroad.
Two Questions if I may?
1) Is the Turbo Timer on the console a standard feature or an add on?
2) Is it worth considering a Detronic or Tunit unit to up the hp and torque?
Regards and thanks in anticipation of expert advice of readers.