well its is determined by the paint type
my HOK paints i do 2-3 coats then like 4 coats of clear
krylon metallics i usually do 5 coats then 4 coats of clear
gloss 2 coats 4 coats of clear
as for the two tone i spary the light color first let it dry for a few hours,mask the area i want that color off(usually the top),press the tape down for full coverage,then i paint th rest of the car the darker color, let that sit for 1/2 hour,remove the tape,touch up the BLEEDERS
if i add a pinstripe i get 1/8 inch masking tape on both sides of where i want the line to be then get the color and hand paint it
its hard at first but when you get use to it it becomes easy