How much is a used Audi R8?

I bought a Ford Explorer from my brother that’s still under warranty, but I honestly didn’t pay too much attention to how far into the warranty the vehicle was when I got it. I’d like to take it in for service, but I don't want to assume that the necessary fixes will be covered by the warranty if it lapsed. How can I check the status of a Ford warranty?

I bought my teen a 1999 Toyota Corolla for their first car. It’s running great, but they can’t pop the hood of their car. When you pull on the release handle, it doesn’t feel like you’re pulling on anything. How can I fix the hood release handle?

My dog has long claws and is constantly digging into my leather seats when we run errands. I try to keep them trimmed, but they just keep growing! I love her to death, but I want to keep my car as long as possible and these seats weren't cheap. How do I protect my leather seats from my dog?