Yes. You have to have members to aquire it, as well as having a 5-year old account.
Yes, you can do a runescape skill cape emote on a non members world even though the cape itself it a members only item, you can still do the emote as long as your wearing the cape.
You can buy it cheaply (50-60 gp) from the Grand Exchange (members only item).
Yes
Yes the Staff of Iban is a members only item.
Only members can get it, from treasure trails. However, both members and non-members can buy it and use it.
Fraid so, only members can fish, cook and eat them.
You don't. That's a members-only item.
Sara sword ^^ i gotted one i dont know what the best item is but this is a lie you cant get sara sword on runescape to my knowlage you can only get the sara armour but it may be a members only item as i am only a free player
78 types of items for non-members, 516 for members. Each of these "slots" can hold up to about 2 billion of a single type of item.
une cape is a cape (as in the item of clothing)
No.
Just search for 'Runescape item ID database' and you'll find multiple services to search for item ID's.