How much??  What colors?  and other frequent questions about restoring metal standing seam and embossed shingle roofing can be found on this link:

Frequently asked questions about tin roofing

For a quick-and-dirty estimate of pricing, using reputable services (like mine) and the most up-to-date materials, do the following:  Length times width of your home; add another 50% to the area.  Then use the pricing on above page.