Doubts about face to face iInterviews

I know that is very important to have a good impression in an interview with a client, but how you can take control under a situation where for this client is important that you have a car to arrive to the office instead to fulfill with the necessary skills to do the job???

Today I'll discover if that fact is true or if is more important to have the necessary skills and have good attitude (passion) to do the job.