First up, the temperature gauge, I'm guessing this is water temp?
Has this connector at the end of a coil type wire

Other end...

Now oil pressure, I have no other fittings/pipes included so what do I need, where does it go etc?

This is the voltmeter, i put spade connectors on the positive and negative 'prongs' now I just need to know where to wire it into?

And finally, the back lights for all of the gauges, I've tested these with a battery, they all work, so how do these wire in too?

All I know is it would all need to be on a switched power supply...