How do I build an interactive form to display XML results

Question

I need help building an interactive form ... people click radio buttons to choose options for something and see the results appear.. Imagine you were looking at a car?

Color?  Motor size? Body Size? etc...  Say we start with a long list of all the "Cars"... and have it narrow down as they select their options, leaving just one or two "cars" that would work...

 

I'm not using it for cars, that's just a good example word...

 

Thank you for your help