Welcome!

Since you have a new salt pool, is it past the 30-day break-in period before starting the SWG? If so, then you'll want to ensure you have the required amount of salt. The water should also be at least 60 degrees for the SWG to operate. If the water is still cold, or you're still within 30 days of build completion, you'll use regular bleach (pool chlorine) to increase and maintain the proper FC level as noted on the
FC/CYA Chart. Make sure to let the pump run and mix the water for a good 30 min before taking your first water sample for test with your TF-100.
With an SWG, about the only thing you may need right away is some muriatic acid (control the pH) which stores just fine outside somewhere in a safe place/container. I would get 2 gallons for now. You might get a couple gallons of regular bleach just in case the SWG can't be used right away. That's about it until you run all your tests.