My friend it's time for an upgrade. Id just get a new rig.
Yes, you can.
YES
On the Minecraft download page, you can download a Vanilla (standard) Minecraft server for Windows, Mac, and (I think) Linux.
Yes, simply download it from the minecraft website.
Yes
$26.95
Minecraft is available for all computers: Mac, Linux, and Windows. You can download it from minecraft.net.
On the minecraft homepage click on the download button below the buy now button and then select the client you have (Windows, Mac etc) then download it, run it and it should download minecraft.
Yes. I have run a single XFX NVidia GeForce 6600GT and 2 in SLI. Either way it will work. I recommend 2GB of memory and at least a 2GHZ processor, or you will be staring at the same screen for a while.
First, You go to minecraft.net and then click the link that says download. Scroll down to the section that says Multiplayer. click on the link that says Minecraft Server.exe Download and enjoy with your friends :)
Go into google and type in minecraft version changer and download it. It's for windows and for mac. Its completely legal and gives you ANY version of minecraft server.
You can play minecraft on Windows, ios, and or Linex computers all have their download versions located at Minecraft.net