For people who came to Istanbul, these kind of taxi's is familiar for them: the Tufas.Lined up here at a taxi place.
They were (and are) still cheap. But several things changed dramatically.
First, there is a legal ban of smoking in taxi's, both for the driver's as the passengers as well. And second, the Tufas is not there anymore. Most taxi's are now Fiat's, Honda's and even VW's etc.
And about smoking in taxis', just asked the driver if you can light up a cigarette, he will do it as well, as he will be relieved by the words: 'Can I smoke'. Most of the time he will offer you a cigarette and show a hidden ashtray..))