Dean,
I would soak them for a day and clean them. These are not fun to clean, the coating is sticky & stringy
If you have a large number of seeds, there are some seed cleaning enzymes you can use that will dissolve the seed coat. With a small amount, the easiest way I've found is to rub the seed against a stainless steel scrubbing pad
After they are clean, another soak, and then plant them in a community pot about 1/4 " deep. With the Summer heat, it should only take a month or two to see first leaves.
Not too sure about cold tolerance, mine have seen below freezing a couple times, ( during power outages) with no apparent ill effects.
Steve