hi, you can use grab to go there which is more cheaper, but you may have problem to get back from the beach to town as not much grab around the beach. other option is you can ask hotel for private transport (supir), and trust me the fees is very reasonable. they will wait for you till you finished at the beach and send you back to the hotel safely.

It is accessible if you meant to walk around the beach but be extra careful because of the uneven roads, constructions around and sandy pathways.

Lots of areas in Bali where TVNs like Grab and Uber are banned. Best to rent a vehicle.

I think the one in Gianyar the Real plane in Keramas Aero Park. It's a Plane Restaurant at the Rooftop of Keramas.

No I do not think so and it and it is on private land.

we went there using a rental car. you can rent a car easily in Bali with driver

If you like a busy area, I'd recommend Kuta! If you like a quiet area, then I'd recommend Seminyak or Nusa Dua! In regards to activities, I'd recommend Lembongan Island as well as ATV (quad biking) and White Water Rafting! Don't book the activities direct from your hotel because it can be very expensive! If you want to book activities, there are many places on the street. You do have to bargain with them to get the price you want!