It is 4. Also including locks and keys.

I would not use the product number to know if it fits, or not your car's roof rail. You would know if the product fits, or not, by understanding for what type of car roof rail is that product for. The type of roof car rail this product is suited for is named "Raised Side Rail". So as long as your car has "Raised Side Rail" this will work just fine. Best!

There is a configurator for the roof racks on thule.com, which shows what can be fitted for each vehicle

Hello, Yes, it's compatible. Check again on the Thule website, just enter the make and model of your vehicle. I don't want to be responsible ;-)

Only the 4 feet. The bar must be purchased separately.

I have these feet in use on our Kodiaq. Fits 👍

Yes, the reference of this product is 7104.

Here is the answer from our responsible department: This should indeed work, but please note if it has the right length of rod. Depending on the vehicle, a longer or shorter version may be required. According to the manufacturer's website, the WingBar should be a matching support profile, but please advise customers to check with the manufacturer (https://support.thule.com/s/contactsupport?language=fr).

According to the product information, this is not specified. Therefore we cannot guarantee this. ):

You can see what is compatible in the Thule buying guide. The Raised Rail is a universal carrier, but better check here: https://www.thule.com/de-de/buyers-guide

Yes, it is together with the lock.

According to the information found, it consists of 4 rooms.

https://www.thule.com/de-ch/articles/guides/what-can-i-use-my-thule-roof-rack-for

This is only the set of feet, you also need the rails. The latter are available in different lengths, so it is important that they fit your car.