Our house has a septic system. We have two toliets and down stairs in ou basement the pipes starting leaking from where it seem to be where the toliets are located. The bowl of the toilet is empty now. Both toliets are empty now. Any ideas?

"down stairs in ou basement the pipes starting leaking from where it seem to be where the toliets are located."
Are you telling us that both toilets are leaking from the closet bends? This tells me that you have had a major backup and the closet bends are overflowing at the wax seal. Wax seals are designed to seal the toilet when it's flushing but will not hold water when it backs up the other way.
If the clog let go the suction of the draining water could pull the water out of both the trap and bowl of each toilet. I hope you gave each one a flush to fill the traps back up so you didn't leave open lines direct to the sewer.
Get someone out to snake out the blocked drain line. Good kuck, tom