Brakes go to the floor

With the fact that both these issues are happening the most likely cause of this would be the master cylinder.

Here are a couple guides that will help with this:

https://www.2carpros.com/articles/brake-pedal-goes-to-the-floor

https://www.2carpros.com/articles/how-to-replace-a-brake-master-cylinder

I would suggest capping the lines on the master cylinder and making sure you have a hard pedal.

If you do not, then the master needs to be replaced.

The guides above will help with this process. Unfortunately, we don't have a manual on this vehicle as it is not offered in the USA, but these guides should help with the replacement.

Also, you will need to bleed the brakes so here is a guide that will help with this.

https://www.2carpros.com/articles/how-to-bleed-or-flush-a-car-brake-system

Please run through all this info and let us know what questions you have. Thanks