1) light bulbs- take out the cover by turning it counter clockwise. after removing the cover you'll see the bulb is held in by 2 clips on either side of the bulb. loosen the clips and take the bulb out. do everything in revers and you got it.
2)Washer nozzles- take the clips off the heat shield on the hood. disconnect the hoses from the OEM nozzles and pop them out. put the new nozzles in, hook up the hoses and run the power line to some power source. usually the corner light power leads.
as for the spark plugs, i'm pretty sure if you remove the covers on top of the engine, you'll be able to see them. just unscrew them, gap the new plugs and screw it back in with the correct torque. someone else sould give you better details on this one.