Restore to factory settings

I have a Windows Vista system on a Dell computer. I want to restore the system back to factory settings. I have a reinstal disk for the opreating system, a disk for devise installing and a disk for the moniter.
Are these the items i will need, if not what will i need?

Also, can i use one blank disk to save those programs that i want to keep or will i need a disk for each program i wish to save?