1. International school is a better option. The last years are critical and studying in a Dutch school requires to learn decent Dutch and would most likely not possible to catch up to the level required in such short time.
2. About 10k per year. Maybe you can make a deal with your employer to sponsor it given the circumstances.
3. Yes, many do.
Note that dependent visa for children expires the day they turn 18yrs. Your elder kid will need to have own study visa by then. But English options are available though it will need some research.

We are planning to move my elder kid , who will be completing 10th(Cambridge) grade in India by next October, and younger one in 5th grade. My question is

1) Is 11th grade available in Dutch schools with English
2) If International school , what should we do, how much would be fees in International school?
3) For the younger kid(10) , will she able to adapt to dutch school?

Children easily cope up. Initial few years you get free assistance from the school and also a speech therapist (logopidi). Additionally if required, private tutors are also available at nominal rates. Get the TC and the phone/email contact details of your daughter’s school in India in case the school here wants to call them for any additional feedback. Ask this question also in FB group to get the latest experience from people who recently moved.

I have no idea what ‘Immersion School’ is. If you mean international school, then there is no loss of 1 year. If you decide on the Dutch school, you will have a discussion with them before they take her into the school. During the discussion you can make a decision together.

International schools do not require CITO score. So no worries there. If you want to switch after an year, note that only few Dutch schools will take 12+yrs old international students without a CITO score. These few schools will rely on the feedback from the previous school. So find such schools in your neighborhood and apply. If you are already in NL, there is specific time period which is usually in Feb that you can apply. Refer school website for this. I am not aware of a way where a child can write CITO being in international school. It would be difficult for the child since the exam is in Dutch.

Best,
Vishal

Even in Dutch mediums, they get lot of exposure to English. I know many Indian kids learning in Dutch medium and very fluent in English and also their mother tongue. Personally I don’t think it would be a problem.

Nice article, thanks. Do you know if a kid studying here in Dutch school till 13 years old and goes back to India and adopting to Indian schools? She would have studied everything in Dutch and then adapting to english terms is like big pain right. Any insight on this field would be grateful from your or your friends experience.