Farber's video of the 109 is great. For the Spitfire or Hurricane startup and for general tutorials just try youtube, plenty of videos there.
I do like this guys videos at
http://www.flightsimvids.com/ (I think they are by Freycinet / Søren Dalsgaard) and he has one for the Spitfire I.
One thing to bear in mind when browsing videos for RAF is that the mixture controls for the Spitfire and Hurricane have recently been fixed - 'back' is now autorich and 'forward' is lean (this was reversed before).
As a rough general guide for RAF fighters: open canopy, set mixture to autorich (back), throttle 15%, prop to fine (fully forward), radiator closed, open fuel cock, magnetos on, press 'I' on keyboard for ignition. Propeller should now be spinning. RAF planes require warming up before throttling forward, time varies depending on which variant - some will throttle forward quite quickly but will shake and splutter, on others the engine will cut out completely. If in doubt wait until you have around 60-70'C water temp before you throttle forward. Once the engine has warmed up and you are able to taxi, open the radiator fully. Remember to open that radiator as soon as you are moving and don't let it get much above 100'C. Once airborne, gear up, canopy closed, check again your radiator is open. Build up speed to >200mph and then close your radiator to 50% - RAF planes have large radiator drag so you don't want to be flying with it fully open unless you have to. With all RAF fighters keep a close eye on your oil and water temps as they spike up very quickly especially in combat and as you gain altitude. Keep a constant eye on temps always and adjust your boost and prop pitch/rpm settings accordingly. On planes with CSP (anything other than the Spit I or Hurricane DH5) as a rough guide use 3000rpm for takeoff and emergencies, 2800/2600 at low altitudes and 2400 at higher altitudes, depending on engine temps.
One added extra - some of the RAF fighters have boost cut out (they all do but it only works on those with 100 octane fuel - the Hurricane I 100 Oct, Spitfire Ia 100 Oct, & Spit 2a). Pushing 'through the gate' can be a life line but you will consume fuel faster and your engine will heat up quickly, so use sparingly. To get extra emergency power click on the red tab in front of the throttle lever, it will flick forward and if you shunt your throttle lever back then forward you will get 110% throttle and increased boost (12lbs boost). You may need to decrease your rpm in order not to ruin your engine too quickly when using boost cut out - again keep an eye on temps
