Inside pads on all four tires wore out completely

When the pads do not wear evenly it is because the caliper is sticking due to sticking caliper pins. Here are some guides that will help with this:

https://www.2carpros.com/articles/how-to-replace-front-brake-pads-and-rotors-fwd

https://www.2carpros.com/articles/how-to-replace-rear-brake-pads-and-rotors

If when the caliper pins are cleaned and lubricated the pads still are wearing unevenly, then you will need to replace the calipers as the piston is not returning after being extended. Here is a guide that will help with this:

https://www.2carpros.com/articles/brake-caliper-replacement

Also, below is the process from the manual on how to replace the pads. Let's run through this material and report back what you find.