you can't buy it like gold, diamond etc, the new reserved elite visa is by invitation from elite visa only and it's limited to 100 people per year and you can only apply if you have been invited to apply by them.
Reserved elite membership and the original elite life-time membership can be transferred to another person one time for a cost. Not sure about the original but the reserve is 20%
Nope, only one extension per 30 day visa exemption.
Also สวัสดีครับ = sawadee khrab (pronouced as khrap) not sawadeecup. ครับ is used at the end of a sentence to be polite/ or to show acknowledge (when used by itself)
If you don't plan to travel outside Thailand and don't want to do a border bounce you are better off getting a Tourist Visa before coming. That will give you a 60 day stamp which can be extended by 30 days giving you 90 days total. Otherwise your other option is visa exemption which will get you 30 days plus a 30 day extension (60 days total) and in order to get the last week you will need to leave the country and re-enter again.
Are you on a visa exemption or did you get a Tourist visa before you came here? If you got a visa before you came and haven't already extended it then you can go to immigration and get a 30 day extension.