Like Miata's, I'd bet that to change the idle speed you have to insert a jumper wire (or paperclip) between two pints on the diagnostic box. On the Miata's it's the Ten and ground I think. This puts the car intoa simple mode where it doesn't use the computer to adjust anything. You then set the timing where you want it and also set the idle speed. This "zeroes" out the system and adjusts the baseline so from then on the computer adjusts it to that location.
As far as needing more idle to help you take off from a start I agree with everyone who says "learn how to drive". Not in a mean way but put very simply, you are not giving it enough gas when releasing the clutch, so the car stalls out or lugs really bad. You'll soon learn to give it the right amount of gas and clutch once your feet become sensitive to the feel.
Don't be afraid to "slip the clutch" or give it gas (for instance, to bring the revs up to 2500 rpm) and hold it, then sloooowwly release the clutch and you'll feel it slowly start to grab and take off. Ease off the clutch slowly at the same rate of speed until your foot is completely off the pedal. If the car starts bucking or you feel scared, push the clutch in and everything stops, no big deal, then try again.
Do this in an empty parking lot a bunch of times every morning until you are 100% confident. It's hard now but will get easier.
Good luck and leave the idle alone.
