Well, information like that would help in your question, instead of asking what breed and posting a couple pictures.
Looking things up in an Equine book I have he could be a Newfoundland pony
"Physical characteristics of the Newfoundland pony include a height of 11-14.2 hands in height; a dark, thick mane, and also a dark, thick tail in lower sections. It is commonly brownish in color though other colors are common; some Newfoundland ponies experience mild to drastic color changes from season to season. The weight of the pony ranges from 400 up to 800 pounds, its hooves are small, hard, and its tail is low set. Newfoundland Ponies can come in a variety of colors that include blue roan, grey, chestnut, black, and bay." Source