You use the smoker when you go into the hive to check it out. What the smoke does is it tells the bees that there's a fire (forest fire for example) and that they are in need of danger. Therefore, their goal is not to defend the hive (sting you, therefore they die) but to eat their honey and salvage what they can before the fire gets there. Don't worry - they won't actually run away from your hive ha! It's a distraction tool
I'm a first year beekeeper so I feel like I can give you any advice you may have since sometimes veteran's advice is good but they can use words and processes that confuse a newbie like you and me. So, ask anything you need and keep in touch.
The bee group/company you called should have everything you need. Definitely go to them for advice. Idk if they're into sales (most aren't) but you really don't need anything than this below FOR NOW:
https://www.amazon.com/gp/product/B07BHKH29B/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1
- the little plastic bottle thing is your feeder. make a 1:1 sugar (granulated pure cane) to water mix and boil it until it dissolves. Cool it down (time + ice) and then give it to your bees in a beer bottle flipped upside down into the plastic bottle feeder - it goes in the bottom of your hive area; the entrance. It will all make sense when you get your stuff and see it. Gloves, head gear, scraper, and feeder. You're good to start!
of course make sure you get frames and wax foundation - did that come in your kit? I assume so.
Idk what that yellow thing is but you don't need it for now.
This is a good book. I LIKED it but didn't love it. It's informative but it didn't really get me ready for beekeeping honestly. I think it would be better if I read it 4 months in now than starting out.
https://www.amazon.com/gp/product/1631593323/ref=ppx_yo_dt_b_search_asin_image?ie=UTF8&psc=1
youtube:
https://www.youtube.com/results?search_query=basics+of+beekeeping+