electric fan how to

i have a 96 taco and want to put my electric fan on but dont realy know what to hook it up to so i dont have to put a on/off switch on it. i want it to come on by itself help would be great thanks.

look at some street rod companies they all sell thermostat and relay kits for fans, there kinda pricey, 70-80 bucks usually if u wan tall the wiring and relays with the thermostat, but well worth it because they get u everything in one shot!!