Ganga Sagar Express - सारे तीर्थ बार-बार, गंगासागर एक बार - Rahul Kumar

I have partially confirmed TATKAL ticket for tomorrow travel.out 3 passengers,1 is confirmed and 2 are in waiting.my questions are
1.if my ticket status remains same that is 1 CF,2 WL,can remaining 2 wll be allowed to travel the train?
2.if status remains same and if I wish to cancel it,will i Get refund? if yes how much will I get.
3.My travel starts...
more...

at 7 pm and the train starts at 8 am same day,so chart will be prepared 4 hrs before ,so after prepariong the chart and if my status remains same,can I cancel the ticket say 4 hrs before my actual journey starts (3pm ) and get refund?
Thanks,needs answers ASAP