If I have an international driving license + my EU-drv.lic.

and go to a car dealer and buy a car, how much

bureaucratic bs and red tape will I run into ? is it possible

at all to register and get insurance as a "farang"

You need a Non-Immigrant visa, any class, plus EITHER a work permit OR a simple standard letter from Immigration confirming your address in Thailand.

There is no requirement to have a driving license to register a car i your name.

Car ownership in Thailand

<font color='#000000'>You need a Non-Immigrant visa, any class, plus EITHER a work permit OR a simple standard letter from Immigration confirming your address in Thailand.

There is no requirement to have a driving license to register a car i your name.</font>

I can confirm that, same experience.