To fix anything to do with the display, outside of AppleCare plus, on the 15-inch model runs about US$800, and there are no smaller parts, only display assembly, complete.
to fix anything regarding the keyboard, trackpad, battery, or the metal top-plate to which all are attached requires replacement of that assembly, complete, and runs around US$500 -ish. Because of repair-by-replacement, you get a new battery with any repair in that area.
to get Apple to make ANY repairs, they require you to bring everything into working order.
If you can get access to "Depot repair", they will send it out and fix everything for one flat rate, which is typically somewhat less than the cost of the individual repairs.
Realistically, counting the shipping delays coming and going, that process runs about 10 days elapsed time. My experience has been that they often quote you less time, but it will still take about 10 days. If, by some miracle, you actually get it back in less than 10 days, Merry Christmas.