You 'use' RAM, not lose it.
as long as you have 2gb of ram, which is how much Bethesda have restricted Skyrim to use on any computer ( without the use of a mod), you should be able to run Skyrim, mediocrely
You don't get one in Skyrim that's real life your thinking about.
It's a role playing game
Intel core i 5 with 1028 mb of graphics are the best laptop specs for playing battlefield 4 and skyrim.
Intel(R) Core i3 CPU 3.20GHz 4GB Ram 64 bit
If you like role playing games and have a decent to higher-end computer(if you are playing on pc). Skyrim is one fo the coolest RPGs I have ever played, but a pretty decent graphics card(for pc) and proccessing capabilites are necessary to appreciate the full artwork that is Skyrim.
RAM, No. HDD, Yes, Unless you transfer it of course
Both. Skyrim has more modern graphics and mechanics, is longer and is less repetative, but playing Oblivion adds another layer of depth to the world of Skyrim. For example, Margret is visiting Skyrim from Cyrodil, the main location in Oblivion, and simply knowing about the location where she comes from makes it more enjoyable. If you can only play 1, then make it Skyrim.
There's nothing to join, you just buy the game and start playing.
If you mean playing it then yes, if not, then it's up to you.
There isn't notoriety in Skyrim. Instead, a bounty system exists for each hold. You can get rid of your bounty by going to jail, paying the bounty, or paying off Delvin of the Thieves' Guild.
Not really. It is a bit tame in content when you compare it to games like The Witcher, and Dragon Age.