yes, range is really good once you get to a high lvl in it, mainly because you can not be hit, while doing damage, and range is less expensive than mage
Out of most the people who pvp are pures. It really matters if your defense is good and if you have good range level and the armor helps a lot.
if you plan on getting melee up, then yes, but it is VERY useful to have 44 prayer, (for anti-pjing, monster killing, increased max hits, etc)
for me training range is the best way, i advice you to be a tank or a ranged 2h-er(pures)
Training on Experiments near Canfis is probably the bestest spot for pures to train, mainly because the enemies are level 25, but they have 100 hp giving 400 exp per kill.
Green Dragon Hide
most likely, because pures would not use it if it only gave att or def.
no
There's not much source of information on whom the 1st pure was, there may have been loads of 1st pures created at the same time.
Pures are 1-20 defense
You can get some good xp from doing minigames and then cashing in the points for the skill or just train it.
Strength, magic or range an attack all at least 70+.
It is if you have Dragon Arrows, with 99 range it can hit a max of two 30+'s.