VCR: you need to find AV out, not AV in. This AV out has three connectors (yellow, red and white), normally, yellow is for video, red and white are audio left and right. If you do not have AV out in this format so called composite video, you can get a Scart to C-Video converter from Maplin.
So next step is just connect them up to your card.
VCR out link to card's audio & video in, just connect the same colour, red to red, white to white, yellow to yellow.
I do not know your card spec, some cards do not have audio in. If this is the case, you need to connect auido to sound card Line-in, for this you need a converter which combine left and right into one stero plug, again you can get it from Maplin.