>>3 Radioshack?
Sure, but their selection is primarily "web only".
Inexpensive = no-name brand PCI TV Tuner card, installation required, <$50USD
Easy = name-brand external device, likely USB2.0, ~$100USD and beyond
If quality is not an issue, settle for coaxial/composite connection inputs.
Opt for S-Video only if your VCR supports it.
Don't expect the sound to be all that great; esp. with the cheaper stuff.