How much time does it takes for an Ad to start running when it is Purchased ??
My ad was Confirmed more than 24 hours ago but still not a Single click has been Delivered

I think someone just answered that...
Is it normal for purchased ads to stay "Pending review" for almost a day? Plus your Contact form doesn't seem to be working at the moment.
Yes this is normal... I've had it take 3+ days.