I have just been in the ski pass office.
There is no photo associated with ski-passes up to 7 days. However, there is the ski-passes starting from 2 days have the gender of the holder associated with it. Of course, sharing or swapping a ski-pass is illegal, and may result in confiscation of the ski-pass if found.
To answer the second half of the question, there don't seem to be any free lifts.
UPDATE: I also found out that if your child has at most 3 years, you can buy a special family skipass (20% more expensive than the corresponding normal one), which can be shared between the parents. If you do the math, it becomes cheaper than multiple one day passes starting from 7 days.