Can one truly put a price on safety? - Rhetorical.
Don't take this the wrong way (and apologies for side-tracking your question at hand), but don't feel "locked in" towards having to spend a certain amount of money for your first set(s) of gear. Gear is available for all types of budgets.
IMHO, you should set your budget and look for gear that fits within that amount of money - start pricing stuff out and see how far your dollar goes.
Concentrate on finding gear that
fits properly and feels comfortable (as well as providing a solid level of protection; ie - gear appropriate for the type of riding you do, whether it's solely on the street or strictly for track duty, or a combination of both).
You can spend as little as perhaps $30 on any of the above pieces of gear in your list above or as high as several hundred dollars per item.
If you want the "higher end" stuff for cheap, look for "closeout/sale" pricing at several of our forum sponsors/vendors - just remember to move quickly before the sizes you want are sold out (as with anything else, this typically happens when awesome deals are announced). Gotta act quick and purchase 'em before others buy 'em up. LOL
G'luck...