Can anyone identify what kind of evergreen trees are these and what is wrong with them
Looks like blue spruce, Picea pungens 'Koster', also known as Colorado spruce. These are fairly tolerant of various conditions, including some drought, once they are mature, but yours may have suffered some drought when they were smaller, which would explain the loss of some of the lower branches/foliage. The growth higher up looks healthy, although aesthetically, the overall shape isn't fantastic; this may or may not improve as the trees age.
Unfortunately, once needles have died and fallen from a branch, growth will only continue from the tips of the branch and will not regrow in the bare areas. Which is likely why the other tree has had its lower branches removed, because they died back. Further info https://www.gardenia.net/plant/Picea-pungens-Koster