The Pathfinder is essentially a minivan in SUV disguise and competes with other three row vehicles that have seven seats. An roomy interior and easy access moves it closer to a family-friendly minivan substitute, which could be a good thing. Overall the Pathfinder is practical but rather boring to drive and doesn't stand out against its many peers.
The Pathfinder has a pretty comfortable ride, decent power, and straightforward controls. The second row has a handy feature: It can slide forward to clear a path to the third row even when a child seat is installed in it. Kids will probably like the two-person third row just fine, but adults won't be comfortable there, so this car isn't a great choice for car-pooling grownups. Furthermore, mounting child seats can be a bit of a chore.
In most cases, automotive warranties are based on the vehicle identification number (VIN), and the warranty will be valid regardless of ownership. The dealership can tell you exactly how much warranty is left.
Read more about extended warranties