It is indeed a Yokomo chassis. I think this is a type J car, I will attempt to find out exactly what it was called but I can tell you that my brother owned one of these. Yes its a older car, I would say roughly about 1998 or so. Parts will be hard to locate now because of that. As far as batteries go you just need some 6 cell saddle packs or a 2s saddle lipo for it but I would take careful measurements before purchasing anything for it.
Steve