Why are you wanting to do this in Photoshop? Indesign would be the program you would want to use to execute this task.
I don't have Indesign on my computer, nor do I know how to use it and the brochure template I bought is for Photoshop!
I believe the only way to do this is in Photoshop is to slice your image and then assigning a URL to each slice by double clicking the slice number and entering your destination link in the dialog box that appears.
Is the template you purchased already sliced?
View>Show>Slices to reveal slices if there are any
... I then tried to upload the Photoshop PDF into Acrobat Pro but when I clicked on "auto create weblinks" nothing was found.
Auto create doesn't do it. I think because the url is lost.
But you can select the link text > right mouse click > create link ...
Beware that the text layers are not rasterized.