I just got a very nice '95 Explorer xlt 6 cyl. auto. suv. Quirks?

The only way to tell why the ABS light is on is to retrieve the codes with a scanner and follow the proper diagnostic steps to isolate the concern. As for the metal tubes under the rear seats, they are the extensions that hook together so you can lower the spare tire down from underneath the back of the vehicle. It should tell you in the owner manual how they go together aand work.