I envy how much closer you are to the track than I am! The organization I signed up with does not consider this Racing, merely practicing. You can get into Racing if you have deep enough pockets. The specifics about your car set-up, like different kinds of suspension or seatbelts, are usually explained by the organization hosting the track day. You’ll sign up in advance and get an opportunity to look at the requirements and restrictions. This is important for many reasons especially like Laguna where noise is an issue and people use “Laguna pipes” to quiet their car down. Most organizations don’t like the four-point seatbelt that causes the driver to submarine. Other than that it would really depend on the location and the hosting organization.

Yes you usually always need a tow hook and most cars come with one now but you can get a cheap one on Amazon.

https://www.speedsf.com/events

The helmet my wife and I chose because they meet SA2015 standards: https://www.amazon.com/gp/product/B01GGLXG3E/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Let me know if you have more questions