Harry Potter Questions - The Burrow

Is it stated in the books (preferably) or shown in the films, how Mr Weasley commutes from his job at The Ministry to his home at The Burrow?

If it isn't stated, what is your best guess at method of travel?

Is it generally accepted that Ottery St. Catchpole is in Devon? Meaning, does it actually state Devon in the books anywhere or are we all guessing based on the real village it was named after?