For motorcycle stuff better ask in this group. But guessing when you enter by road it will ask for the plate number (same as malaysia and singapore) there are other things to do with insurance and stuff as well but check with this group for latest info on that
Yes you can get a yellow book and pink ID card. Advise getting at same time. Need paperwork from British embassy proving your passport it was same paperwork as needed for marriage so i used that one plus other stuff forgotten now exactly what i needed.
Blue house book is given when purchased. But believe she would need to transfer her main residence to that and not sure how that works. You really need to check in area your wife is purchasing house as with lots of things its different in different areas.
Suggest friend look at UAE embassy website for Bangkok or contact embassy. I am presuming friend holds a Thai passport although you didnt mention that important bit of information
How old are you ? If over 50 you can just change your extension to retirement. If under 50 you have elite or DTV but be aware if on DTV you may have issues with your bank
no its not. You put departure country (origin) and then for flight you put the flight you enter country in. Transit countries do not count as departure countries
You put original departure country. This is for health reason if you are coming from a country which yellow fever vaccinations are required. For flight you put the flight you enter Thailand.