Looking for help/advice: Fixing up wooden chairs.

https://imgur.com/a/IHn4o1w​Looking to fix up some chairs that I recently got off Facebook. (see link) They need a bit of TLC. I have 4 and this is the worst, the joints are coming out and it's quite wobbly. What do people suggest? First project like this, not really done anything like this before.​Thank you! via /r/DIY https://ift.tt/2OyP9vS