You're facing a combo of a deck that's too old and a computer that's too new. They don't speak the same language.
So here's what will work. Buy yourself a BlackMagic Video Recorder dongle (http://www.blackmagicdesign.com/products/videorecorder/)
Take the analog outputs of your hardware video player and connect the Video and audio outputs to the inputs on the BMVR and then plug THAT into the USB port on your laptop.
The BMVR comes with simple to operate software. You launch it and when the deck is playing, you can capture it's video output into an H-264 encoded video file on your laptop. FCP-X will then be able to easily IMPORT the resulting video file and you can edit it in FCP-X.
To avoid much of the hassle of this process, you'll probably eventually want to replace your camcorder with one that records to a card-based file rather than to physical tape. If so, it's likely that with a simple, inexpensive card reader, you can get rid of all the file translation steps and just directly import the card files into your laptop to start editing.
Hope that helps.
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