Smoking

The First Doctor smokes a pipe. (TV: An Unearthly Child)

Aboard the SS Madame de Pompadour, smoking was done within smoking pods. (TV: The Girl in the Fireplace)

The fifth incarnation of the renegade Time Lord who would become the Monk spent some time in the 1970s and developed a smoking habit which caused his voice to become gravelly. (PROSE: How The Monk Got His Habit)