Hi Esbolico well it depends on which version of FS you have. There is a cold start gauge available for FS2k2, and I think FS2k4 (FS9). More popular is to setup the flight, save it with everything off, and then set it as your default flight. Ultimately its up to you.
Ozzy
Ps. The cold start gauge is available here in downloads
There are two types of aeroplane, Spitfires and everything else that wishes it was a Spitfire!