@Renée40,
Almost all of the items that are displayed in the picture of the continental breakfast come in smaller, individual sizes (e.g., almond milk, cold cereal, yogurt, fruits, instant oatmeal, etc.), and could be placed in the rooms and fridges. For hygiene purposes, just tell the guests to bring their used dishes to the kitchen, and that they can pick up a fresh set later in the day.
You've had different experiences than I have with guests and TVs. We have three guest suites on the same level, and each has a TV, but the guests have never played any of them loud enough where the actual sound was discernable from the hallway. However, I do have a house rule about noise.
Everyone hosts a little differently, and here's what I do. When I get reservations, I tell guests in my introductory message that during check-in I will be wearing a mask, and maintain social distancing during the walkthrough of their rented space. Thus far, every guest has also worn a mask and complied with social distancing. The interactions with my guests usually are not long conversations as I may speak with them for a few minutes when they are leaving or returning. I don't foresee the need to wear a mask in my home for extended periods of time. Even if we shared a kitchen, I wouldn't linger in the same space while they were preparing their food or eating in the dining area.