Sorry I don’t speak tagalog or Viseya very well, so correct me if i am incorrect in my translation. In 2008 you had a professional drivers license and then you went to qatar as an OFW.
Your 2008 license is now void and you need to start from the beginning, unless you hold a valid drivers license from Qatar, that is current then you can transfer to a philippines licence upon taking a health and eye test. If i got all that wrong please feel free to explain again and I will try to assist.
You need to contact the BI helpline and explain your situation to them specifically. They may be able to give leeway for winding down or closing activities associated with your previous study. You may find thast the visa is specific about the grace period, but if so you visa would have ended on that date. (for example 2 weeks after graduation)
You can ring the BI helpline on (02-465-2400 Extension 213)
Yes you can provided you have the deed of sale.
You also need to have 3rd party insurance, whichj is normally cancelled by the selling party when they register their next vehicle.
So you need to transfer the vehicle within 28 days, otherwise you will face a fine when you eventually get round to doing the transfer. It is currently 150 peso, but I understand is due to rise substantially because of the reluctance to do the transfer
Yes for 90 days following your entry into the Philippines. Then you must go to the LTO to obtain a Philippines license.
See my response in comments.