The controller adapter should work fine with any controller, but it may not work with a Tap.
As for the AV cable, that's normal for a PAL TG; they used a 5 pin DIN with a 60 degree spread instead of the usual 45 degree spread found in other PCE and Genny hardware. You'll need to find an original or have one custom made like Keith suggested.
P.S. - That thing sure is scroungy looking. I hope ya give her a good scrubbin'.