Hello, the Tobi is secured with the seat belt. Isofix is not available. I don't know if there is an extra station for the seat. But it holds very well with the seat belt. Highly recommended!

Hi, the belt is passed through the top and bottom and is therefore about 1/3 longer than when it is placed around an "average person". You can have a look at the belt guide in the manual: http://www.maxi-cosi.com/ch-de/kindersitze/tobi.aspx. There is not much else to do but "try and error" :-)

Unfortunately, this is not possible.

Contents of the delivery: Maxi-Cosi Tobi Polypropylene Shell - PP

I'm afraid not. Here you can find all approved child seats for in the airplane: https://www.tuv.com/de/germanyinfothek/infothek/kindersitze_flugzeug/hersteller_kindersitze/hersteller_kindersitze.html .

Yes, it is good with the block "underneath". This block allows the car's seatbelt to pass through. It is necessary to buy an extra base to fix it with isofix.