I've played on "Sunday school assembly room" uprights that had the entire ivory missing on a lot of keys. Kind of dangerous to your fingers if you play very fast. I looked at your pictures, these don't look nearly that bad. I hope you can just even them out with the old ivory, a little sanding maybe, and some glue.
Moving an upright is soo difficult, I would do several hours repair on one that was in the right place before I dumped it and got another. I used to be able to get an upright up the stairs with just two other men, but that was 40 years ago. I'm a bit afraid the 400 lb would damage a disk at this age. Pro piano movers charge extra for an upright. No wonder, even a 60 year old like me can carry 1/2 of a 300 lb console piano.