Where do you live? Look for a bike co-op or recycler and maybe you can scrounge some cogs to fit that old cassette.
I’d be a bit concerned about how that dropout is spread open.
pedals?
The replacement wheels a good suggestion and here again a co-op place that sells used good bike parts is where to look first.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk