Mate, found another PC I am interested in (Dell system)

Got a P4 with 1GB cache and 120gb HDD and the usual CDRW/DVD-ROM combo drive, but only has a 256mb RAM....

How do I go about upping that to 512 if I buy this?

Also no monitor, but does have Graphics Card, Keyboard, Modem, Mouse, Network Card, Operating System, Speakers, USB...

Plus a 1.44 floppy which is a MUST (as my old dear brings all her lesson plans home from school on floppy and needs floppy at home to print etc)

So can you get hold of black Dell monitors on the cheap? Might have alead on a 15" TFT but TBH, if it comes to it, a 17" CRT will do.....