In his dress and diet, he was distinctive from what was normal for the times. His dress was durable and serviceable—what would normally be associated with the clothing of the poorest of the land. The same is true of his diet. His diet would be unusual for us but common for the poor folk of his time.
Regarding how he lived, Luke 1:80 adds, "So the child grew and became strong in spirit, and was in the deserts till the day of his manifestation to Israel." Mark 2:18 shows that he and his disciples lived an ascetic lifestyle. Taken together, these verses indicate that despite John's greatness, God kept him a poor man. People who live their entire lives in the desert do not usually become rich. His home, though undoubtedly not a hovel, was certainly nowhere near what we are familiar with in wealthy, modern Israel. From this we can learn that God does not owe us what we would like to have, but He provides what we need to serve His purpose for us.
We can be assured that since he had God's Spirit from birth, as Luke 1:15 states, he was in no way the almost wild man he is usually perceived as in movies. Paul says in II Timothy 1:7, "For God has not given us a spirit of fear, but of power and of love and of a sound mind."
Also note that, though John was of the Aaronic line from both parents, no direct connection is ever made between him and the already installed system of Temple worship.
Mark 1:1 says, "The beginning of the gospel of Jesus Christ, the Son of God." The Bible positions John's ministry as the starting point of Christ's gospel, not because John literally preached the gospel, but apparently because of his preparatory work to Jesus preaching it. Verse 5 records, "And all the land of Judea, and those from Jerusalem went out to him and were all baptized by him in the Jordan River, confessing their sins." This reveals the impact of his ministry: All Judea, including folk from Jerusalem, went out to hear and be baptized by him, believing he was a prophet. While "all" does not mean every last person, it indicates a sizeable majority of the population was conversant about John and his message.
John W. Ritenbaugh
Elijah and John the Baptist