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Pete,
Power will usually come from a little battery pack and is plugged into the scope, this can be replaced by a powerplug of the appropriate voltage and amperage (not much) and polarity. There will be a socket somewhere on the bottom of the scope and power is simply plugged in.
The fan is used to speed up the cooling of the mirror and tube and I guess you would run it for the first 30mins or so whilst the scope cools to the outside temp.
Collimating? After a 3hr drive home it may well do. See Astrobaby's guide for a good explanation.
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