Hi,
#1. You must add General price, this is the price charged to customers when they book a tour: https://prnt.sc/34X-BEXGjQUX
Price from is just the price displayed on the booking object.
#2. I have hidden the times field for you, however the Tickets field cannot be hidden.
If this field is hidden, you will not be able to select the number of tickets for the booking object: https://prnt.sc/51uNBuUy7zyq