I cooked on one of those for many years and have mixed feelings. I was able to put out some descent food but it was a huge learning curve and difficult to use. It took me well over a dozen cooks to get a good feel for it. With that said, it will work but I do not recommend putting any appreciable amount of time or money into it.
Clean it up, put any old grate in it and fire it up a half dozen times. No amount of make-up is going to make it work better so see if you can cook with it and it’s worth saving.
I found lump charcoal,in a basket and using the minion method of lighting works best in this style. I got 4-5 hours of pretty steady temps with little adjustment. Real wood is a nightmare. Also a few firebricks in the cook chamber next to the firebox will cut down on radiant heat and allow it to be more usable but expect the first 12 inches near the firebox to be unusable grill space.
If you do decide you like it and you are anywhere near Phoenix, I’ll make you an awesome deal on my old one as I don’t use it anymore.