Can you just drive up and take a picture of the landscape and castle from outside. With out paying ? If you have no time to take a tour and are just passing through?

Yes you can, You can walk around it is beautiful, with more time you can go back and see how beautiful it is inside, try their delicious wines sold only in this place. They have an interesting variety of wines and products.

Absolutely

Yes you can it's really beautiful.

How much do they pay for tour ??? And if I just want to go taste how much wine?

It's highly recommend if you're there and have a few minutes to spare

Yup

You surely can