Buddhists do not worship any gods or people, so there is no one who leads any worship service. A Buddhists master (who might have one of a long list of titles, like Geshe, Lama, Rinpoche, etc) will lead teaching or meditation sessions.
Monk
It is called a temple
its called a stupa
It's called a Pagoda.
You dont worship in Buddhism.
The daily worship leader is called Imam.
Buddhists do not worship, because Buddhism is not a religion. It is a way of life, often couched in symbolic terms, but there are no deities to worship. That being said, a MEDITATION center is called a wat.
A Buddhists place of worship is also called a Temple
A shrine or temple.
An Imam
Buddhism followers worship in temples or they can worship in shines which is a place set aside in the home for prayer and devotion
A monk or a nun usually leads the services. The original term for a monk was bhikkhu, which is still used by the Theravadins, but nowadays different countries and schools have their own terms.