A table saw combines a heavy cast-iron or aluminum table with an exposed blade and a motor slung underneath, so the two real risks are the blade and tipping onto that motor housing. Lowering the blade and never resting the saw on its motor side keeps everyone's hands intact.
Pro tip: If the saw has an original shipping box or foam insert, it is worth digging out of the garage attic; it protects the fence rails better than blankets alone.
Watch out: Never carry or store a table saw with the blade raised; even unplugged, an exposed blade edge can cause a deep cut if someone brushes against it while carrying.