I have been trying to figure out which are the points costs for the several enhancements to tau units, but there is not a single comprehensive list for that. Sometimes model stats sheets have 'may take a markerlight and target lock (15pts),' while some other sheets just say 'may take two items from the support systems list' without specifying any cost. Does it means that I get those items for free (included in the unit price)? Another confusing case is that of Crisis Battle Suits: they 'may take take up to three items from the ranged weapons and/or support systems lists.' For some units different ranged weapons cost different amounts of points, so it sounds strange that crisis suits have access to all of them at the same (zero) cost.
Apparently the older codex had a table on page 95 with all the costs, but I only have access to the 2015 edition and such table is gone.
Am I correct in assuming that such enhancements cost points when a cost is mentioned but are otherwise free?