Look at Tools -> Profile. This should give you all the information you are looking for about your VIs. It maybe only available in Professional Editions.
You can always use the "Tick Count (ms)" VI to get a ms value. So before a section of code runs get the tick count and than after it runs get the tick count. You can then subtract the 2 and there you have the time needed to run that section.
You will most likely need a sequence structure to ensure they are timed correctly. This is one of the few times I use a sequence structure. Of coarse you could also make a SubVI that returns the Tick Count, but also has error in and error out.