It is best to ask a trusted friend if the company starts meetings punctually.  Most likely, they start 15-30 minutes late. 

Greet everyone upon entrance to the meeting venue then greet individuals with hand shakes.  If you know the person in charge of the meeting, you may greet them first if he/she is available. 

Meetings are usually conducted by an individual or committee.  They will know the protocol and structure to begin and end the meeting. 

If you have called the meeting, prepare an agenda prior to the meeting and direct the discussions.