I'm going to add to my earlier comment. Seeing the torn/missing pieces indicates that the quilt indeed has been used and loved in the past. Look closer. Are those pieces "brown"? It seems the dyes of the past for brown have not held up well over the years. I don't know that you will want to fix that quilt if there is a lot to be done. I'd simply fold it so those aren't as noticeable and display it in my home. It does indicate that the family has loved it and used it through the years.
I notice that my daughter has hung the worn quilt from her childhood on a wall rack, tatters and all. Memories on display!