You don't need to take a Thai driving test, just a reaction and eye test. Most DLT offices insist on an IDP for some reason. They wouldn't let me get a licence until I had completed my extension based on marriage, so I'm not sure you can do it with a DTV
Officially you need a degree to teach in Thailand but if you are willing to work outside of metropolitan areas they will still employ you. The are teaching in Thailand groups on FB so join one and get better advice
no it's not. My mobile is registered in my wife's name and I've been extending my visa for 5 years, but you do need to update your new passport with the bank