Looks like it's mainly the broken spokes that have caused the wheel hub to be crooked. If that's all, it is definitely fixable. The 14" Murray rear wheels should take around a 4 1/2" spoke measured from under the hook end. I have some NOS Torrington velocipede spokes in that length I could help you out with along with the nipples if the threads in them are messed up. Unfortunately, I physically couldn't do the work involved to help out due to dealing with rheumatoid arthritis in my hands which is causing me a lot of discomfort. You'd need to heat the tire up in boiling water to soften it so that you can pry it off the wheel. Then the nipples could be removed and replaced along with new spokes. Since the tire is well worn it would be a good idea to have a replacement NOS 14x1.75 semi-pneumatic tire in case the old one still splits after being heated. I see them on ebay a lot and some CABE members might have them, too. They can be different brands such as Clipper, Orco Air King, Goodyear, Swan, Top Flight, etc. Looks like you have Clipper tires on the trike now.
Dave