1. I want to change the order of car details when a new car is added. Additional options are fine, there we can drag&drop. It seems the main values are stored in wp_options in serialized form. This makes it very hard to change the basic settings. Any suggestions?
2. Is it possible to have an open text field as an option for the car? Specifically, we need people to add how many km/miles the car has run already.
1. In accordance to the oroginal idea and design the theme was developed with having that specific order and these changes you are seeking could be achieved only via altering defualt source files which involves custom work. Unfortunately we do not provide our customers with any custom work due to our policy,therefore we do not provide any instructions or files list for implementing customization you are seeking. We only do Support for our products if there are some issues in work, or some elements cause issues, etc.
In case you need to make some customizations you could try to figure this out on your own, which needs some skills in coding and programming.
In case if you believe our theme misses enough custom options to fully meet your needs you could involve/ask for help a third part developer to customize the theme the way you personally like.
Thanks for understanding and sorry for any inconveniences!
2. Ther eis a text field on the first step for adding any info.