No, you will need a separate gift card.
No. You need to get a separate membership for FunOrb membership unless if you got the Runescape and FunOrb Membership Pack.
Not sure, there is a "Knowledge Base" article on it on their site.
Ask the network administrator to enable the RuneScape site. If there is a policy not to play games from within your network (your school or your work, for example), take it as a hint: in this case, you are not supposed to play games.
as long as your java is of a new version, runescape should work fine.
Runescape accounts do not work with frugooscape. Frugooscape is a separate entity from Jagex.
No
Yes, it should be able to work. If not try to contact Runescape.
Because you can't cheat in Runescape, Jagex does state that....
Probably WOW, but Runescape will always work out the cheapest.
no
Yes.
you cant