This cheery wooden fellow on the right represents Budai, a figure in Chinese and other Asian folklore. Budai and the Buddha are often confused. Budai is even known as the Laughing Buddha to make things more confusing, and he is associated with Maitreya, a legendary future Buddha who will return to the Earth when most of current Buddhism has been forgotten. Maitreya is an accepted prophecy among some Buddhists.
Recently it has become fashionable to decorate with statues and images of Buddhas. I have no less than 3 Buddhas and 1 Budai in my home. Yet, there are no surviving images of Gautama Siddhartha from the first 600 years or so of Buddhism. Many of our present statues of Buddha have elements from statues of Gautama Siddhartha carved in Gandhara in the 1st or 2nd century of the Common Era. Gandhara was a kingdom in what is now northern Pakistan and eastern Afghanistan. Interestingly, the area became Hellenized through the invasion of Alexander the Great and his troops around 330 BCE. Greek artistic influences created the first statues of the Buddha.
What did the historic Gautama Siddhartha look like? We don't actually know. Early Buddhist writings say he was a handsome man who had trained as a warrior when younger. These writings praise his complexion. His early biographies say Gautama Siddhartha was born in what is today modern Nepal in Limbini. He taught, lived, and died in northern India. Ethnically, he belonged to the Sakya people. When he was younger he lived a hedonistic life as a pampered prince. Then he was an ascetic who nearly starved himself to death. He probably had black hair like most South Asian people today. In his days as a pampered prince perhaps he was a jolly, stocky man, but in his ascetic days he was almost certainly an emaciated stick figure of a man. Traditional biographies state he lived until the age of 80, a very old age for his day. Like all human beings, he changed over time.