what are all the keys and modules for?

What is your question?

I bought a nice 99 Jag XJ8.. 60K miles.. look like it just came out of the showroom. Got sever keys, including the green Valet key. But sever button modules came. One that has just the logo you can push. And then just a rubber/plastic square. What do they all do?.. Do I just need one of the black keys and one of the button modules to drive it normally?

What makes this problem better or worse?

Just need to know how all the keys and accessories come with it do?

How long has your 1999 Jaguar XJ8 had this problem?

Just bought the car