Your Session Leader will be timing you, and will stop you when your time is up. Generally that means you should plan to present for 15 minutes, and allow 5 minutes for questions and answers. More tips about presenting your Seminar paper are available. What kind of audio visuals, props, etc. Most people use overhead transparancies, but you also have such options as easle and pad, video clips, props, or a laptop with LCD panel or video projector.
Every room has an overhead projector and a VCR with monitor.
Reservations will be first come, first served. The Conference is free and open to the public. Feel free to invite friends, colleagues, family, etc., whether for moral support, professional interest, or to help celebrate one of the major achievements in your graduate study. Your Session Chair will use it to introduce you.