That looks like the first band saw I had. I think it uses round blade guides, so you can just use hardwood dowel stock for them.
Check the motor speed. By the size of the upper pulley, it must have a 3450 rpm motor. Or someone put the big pulley on to slow it down for metal cutting.
Even if the motor is 3450 rpm, I think the blade speed would be too slow for resawing.
If you are going to cut wood, I would check out this calculator to determine pulleys needed.
Wood cutting usually requires 1000 sfpm - 8000. My Delta band saw had a 2200 sfpm blade speed. I changed a pulley and got 3160 sfpm, and it cut much better.
Unless the tires are missing parts, I would try the saw out with the tires on it. When I bought my 1951 Delta band saw, the tires were cracked a lot, and the saw cut fine. I replaced the tires and it cut the same.
Some people buy a used saw and buy every accessory, before seeing how it works. Then realize they want a better saw. Like the guides. you can buy a roller bearing setup, but orig. guides in good shape will usually work fine. Many people prefer the origs. over bearings.
In my book, it's an entry level saw, and worth $50 - $75. Closer to $50, as you won't be able to hear it run.
Good luck with it.