The packaging for the peppers just states that they have been dried and they don't look like they have been processed much.
The only way to answer this is to plant the seeds and see if anything grows. Cherimoya seeds readily yield little trees, and whole spice-bought corriander seed turns into cilantro nicely when you plant it. Be aware that Szechuan pepper grows to 7 meters. You can trim it though. In more temperate parts of the world, you can purchase already sprouted trees from garden stores, and grow them in your home or back yard.
I didn't manage to grow the plants from the seeds. I even tried putting a few in the freezer overnight without any joy.
Legally, only heat-processed seeds are allowed to be sold in the US. It's because they are in the Citrus family and could potentially carry pathogens and affect the citrus industry in the US. See U.S. import ban section: https://en.wikipedia.org/wiki/Sichuan_pepper However I've seen what appear to be un-processed seeds in some Asian Markets. It's really hard to tell. In addition they may require stratification (cold, wet, treatment) to sprout. http://www.pfaf.org/user/Plant.aspx?LatinName=Zanthoxylum+simulans They are available as plants - look up the species Zanthoxylum simulans or related Zanthoxylum species. I've mail-ordered them from a nursery in Oregon.
Yes, stratifying is cold (not freezing), wet, treatment. I put them in a re-close-able bag with moist perlite (or vermiculite, but you can't see the seeds as easily). I put some perlite in a bag, add water then pour out through a partly closed seal all the water I can, and add the seeds. I also use plastic petri dishes and tape them closed (these stack nicely in the fridge). Then just put in the fridge. Don't let them freeze when wet or you may kill them. Some species actually sprout in the fridge (so check occasionally), others not until you plant them and they get exposed to warmth. I'm a bit skeptical that these need 3 months treatment (being native in zone 7-9 conditions). You might plant some at different stages.