I don't think you have a real problem except possibly that huge lesion on the trunk. They need pruning and a regular spray program, but they're bearing fruit.

It looks like your apples had some curculio damage and there is a small bit of cedar apple rust on the leaves as well as some leaf-curling aphid damage but its not that bad. As ltilton states they mainly just need pruning and spraying.

The bigger question you need to think about is if you have the time and interest in tending for fruit trees, they require several sprays per year, monitoring for problems, time to read up on how to do it, etc. And as you can see they tend to get a lot of problems, most of them quite minor but some of them not minor at all.

Scott

If you even have time to prune them once per year, you'll still get some fruit that will do for applesauce. Perhaps if you get the trees a little healthier and open to light, the pests won't be as bad.