ofcourse u can u can go over 30 as a rank
No.
You have to be high ranked
here's the best way to get a high level runescape acount. make an acount train all skills to 70 then train bandits till you have 99 in every combat skill. now you have a high level runescape acount :)
Just buy a good computer, dont forget that Combat arms became high quality game at the last 2 years so good computer is needed.
It depends on the level of your attack, prayer, defence, hitpoints, magic, ranged, prayer and summoning. Download "swiftkit" to get a combat calculator. Range and Mage are not need for Max combat, but training them levels high than your melee skills will level your combat.
It depends on what level you're. If you're a lower level, you will notice that you gain combat levels a lot easier than if you're a high level player.
No one will give you a high level account. Just start again and train like everyone else.
Please create your own account, and raise its level. Account trading is against the rules.
By fighting. If this seems too slow for you - well, there simply is no shortcut. Some quests give experience in combat-related skills, but the amount of experience is not significant. However, to improve your fighting: pick monsters that are below your level (basically, to save food), but at least half your level, so that they are still aggressive. This makes fighting faster. Take the combat triangle into account. For example, if you fight with ranged, you have an advantage against mages, and a disadvantage against melee. Concentrate on one type of combat (melee, ranged, or magic): If, for example, you have a high melee level, and a low ranged level, improving your ranged combat won't help your combat level. Prayer also influences your combat level, but it has to be trained separately from combat - for example, by burrying bones (there are faster options for members). The situation is similar with summoning (a members-only skill). You train it separately, but it also influences your combat level.
no.
none but you should have a high combat level
138 in combat and 99 in every other skill with the exception of dungeoneereing with a level capped at level 120.