Thanks all the answers. I'll stick to my 2 includes luggage and if really necessary add one more. Everything else over that will stay with my friend and will pick up in the future when I'll be back to visit him.
TR visa online. Just Google thai e-visa. I did mine few weeks ago it was only 2 days to get mine. And you can extend for extra 30 days for 1900 baht in any immigration office
Bike licence 105, doctor certificate 200 baht, proof where you live certificate (i don't remember the official name) 300 baht. I paid this in February when i did my bike licence. 605 baht in total.