There is a Wiki out there if you search that covers Ibanez models, and another site that had PDF copies of Ibanez catalogs. Both good sources of information on older Ibanez bass.
If you search for Ibanez serial number lookup, there is a site where you input the sn on the back of the headstock, and it will tell you the year, model and where it was built. That’s where I would start
If you have a battery it’s active, though some models of older Ibanez don’t have a battery door, it’s in the cavity with everything else. You may need to open the cavity to see, but the cover isn’t attached to anything (if it’s on the back of the bass) so it’s low risk.