Why doesn't the Manual mention how to fly the Spitfire?

[NedLynch]

All of the above and the fuel mixture.

In the operating limits I think you will find the procedure for the mixture.
I find that for starting the engine setting the mixture to rich is good but then I set it to lean pretty much right away (going to verify this, don't fly the Spit too often) to have the engine running with nice even and undisturbed rpms.

You can see the difference better in midfilght, set the throttle to 75 - 50% and play with the fuel mixture while observing your rpms.

The best way to get used to starting and taking off in any plane is the cross country mission from the quick missions, just choose your plane and practice without any kind of pressure until it's second nature.

Also at airwarfair.com in the forum you can find videos for start up procedures...or just go to youtube and search for cliffs of dover, startup or something similar to that.