2. I think you're confusing IQ and intelligence. You can't say "I want to improve my intelligence to a point where it is equivalent to that of a person with 160 IQ", you can say "I want to become more intelligent" or that "I want to have an IQ of 160".
There are multiple concepts on the matter. Some say (I strongly disagree with this view), that "intelligence = high IQ", therefore "intelligent person = person with high IQ".
If you agree with this, developing your "intelligence" to 160 equals developing your IQ to 160, which is clearly BS (and impossible, as I've already stated).
Others say that intelligence is subjective (you can call a man "intelligent" if he behaves fine like a diplomat, if he knows how to fix a chair etc.) and IQ is an objective scale, and the connection between these two is disputable the very least (see my example above). If this is true, "transfering" a number from a scale to a subjective category doesn't seem to be logical. There may be a connection to some, and there may not be a connection to others.
Obtaining a high IQ score on an IQ test means that you have a high IQ. Nothing more, nothing less. If you score 10 points more than your friend, that means that your IQ is higher by 10, but you're not "more intelligent by 10".
: You can develop your IQ and develop your intelligence, but the former is not possible at your age (5 points MAX), and the latter can't be measured.