I am going to install Linux Mint 18.3 xfce 32bit. I chose that one because Mint has a reasonably big following and the xfce is supposed to be less resouce intensive (helpful, since this is an old system).
However, it seems like I need to know whether the computer uses legacy bios or UEFI Bios. I am not sure if legacy bios is the right term but to clarify I think I am just talking about the bios that was around right before UEFI.
If it helps at all, I bought the computer in 2007.