Laminate flooring on stair treads only

Id like laminate flooring on my stair treads and on my landing the risers will be painted white, my stairs have 8 normal treads 33 inches x 9 inches, 1 curved tread 35 inches x 9 inches, 3 triangle treads the widest is 46 inches x 22 inches and the landing is 112 inches x 36 inches. how much would this generally cost and would i need any nosing for it and where would i get that?