You can go directly to there. No rush. You can visit paying there.

There is no need to buy ticket in advance for the museum, the factory visit will not be possible for you due to timing. I went to the bmw by taking the hop on hop off 9-12. Drop by bmw main \building where admission is free, visited all of bmw, rolls royce and mini cooper latest model, bought at the gift shop, bought ticket to the museum at 10 euro per pax then visited the museum. Hope this helps.

I remember that the combo tour of the Welt and the Museum was 16 Euro and was about 1-1.5 hours, but not sure how much to add the factory since we didn’t get to do it.

Hi mate, sorry I have no idea. I visited this as part of a group and everything was organised for us. It's really good so have a great time.

It is recommended to arrange a test drive prior to your arrival

Не знаю. Была там осенью. Думаю на сайте музея есть информация