Syntax (the pieces of text you see from page 4 onwards) is basically a set of written commands to use as input for spss.
If you press the "paste" button in the point-and-click menu, it creates a new window (a syntax window), where the written command of what you just inserted in the menus is placed.
If you select this and hit the run button (or: control + r), you run this syntax and thus perform the analyses.
Similarly, you can copy - paste the syntaxes in the manual you found in this syntax window, and run those.
You may just need to alter some things (such as the variable names of the variables you used).
Hope this helps.