If I knew then what I know now, I would have bought a good quality scrapbook and carefully preserved all of the labels in it. Some of the art is wonderful, and others are entirely plain Jane, but it would be a fine collection. For me, that's water under the damn, and I doubt I'll start midstream here, but if someone else is starting out, that's a good idea.
The tins are useful for screws, nails, bolts and fittings, if they are large enough for your particular collection. Otherwise, I'd take pains to properly recycle them, since there is a lot of useful metal that can be constructively recycled, in our poor faltering world. Even if you were an environmental non-believer, it is a simple act of thrift and efficiency.