My car Died on me last week while on the highway

My car Died on me last week while on the highway. Pulled over and smoke was coming from the engine. After a while of sittin I could start the car but would die shortly after. I noticed my oil being completely out(not normal) and I noticed oil on top of the distributor cap. And I also had a misfire on cylinder 1 & 2 before this. Towed to shop and mechanics diagnosis of the problem is I need a new distributor, distributor cap, and distributor rotor. He wants to charge 450$ for the repair but $150 in labor if get the parts myself. My brother is a mechanic at Mazda so I'm thinking if I can get the parts from a junkyard or parts warehouse and directions on how to replace those parts my bro and can do the repair ourselves and save a bunch of money. Can anyone help with directions on how to replace those things?