The screwy one is right...
The switches go onto 'CONT' for take-off and landing and when the engine anti-ice is on.
I used to ask for 'Start switches to FLT' whenever it looked as though flameout might be even an anorexic possibility, ie, hail, heavy rain, significant turbulence, etc.
As to what it costs, you'd need to join Bluecoat and search some recent threads on igniters, costs, and life.