Fireman, Classic, Black Fire Jacket with Red Belt and Buttons, White Helmet (Re-issue Torso)

Comes in 3 sets, made of 4 parts. The lowest-priced set it comes in is 852331 Vintage Minifigure Collection Vol. 1 (RRP £11.75).

Check the minifigures carefully when buying a used set: they're part of its grade.