Can I have the bus schedule from Xinnanmen, Chengdu to Bipenggou and is there daily departure?

Yes, and the bus leaves at 8:30 every morning.
By the way, there are four kinds of tickets in your choice, a single-way ticket, a round-way ticket, a single-way plus tickets of entrance and sightseeing bus, and a round-way plus tickets of entrance, sightseeing bus and hotel.