My friend bought me a hyundai egg cooker(plu 247959) but the instructions only tell you how to soft boil 2 eggs or hard boil 3! and no instructions of other amounts of eggs or how much water to use or how to use the poaching facility!!!

Ignore the instruction manual. Instead look at the measuring cup that comes with your Hyundai PLU 247959 (produced and sold under license by Poundstretcher).
On the side of the measuring cup, you can see three clusters of marks:1. 25 to 40 ml for soft-boiled eggs (symbol of egg with two horizontal lines)2. 45 to 60 ml for medium boiled eggs (symbol of egg with one horizontal line)3. 65 to 80 ml for hard boiled eggs (symbol of egg)
Egg boilers are based on the principle that the larger the volume to be heated is, the less water is required. In other words, you will need to add less water for boiling seven eggs, and more water for boiling one or two eggs.
Which means that for seven eggs to soft boil, add 25 ml; and for one egg to soft boil, add 40 ml. If you look at the markings, you'll notice that on the vertical line between 40 and 25 ml, there are seven equidistant horizontal lines, each showing the amount of water required for the various quantities of eggs.
One egg = fill with water up to the 40 ml markTwo eggs = fill up to the mark below the 40 ml markThree eggs = fill up to the second mark below the 40 ml markFour eggs = fill up to the third mark below the 40 ml mark etc, untilSeven eggs = fill up to the 25 ml mark
Medium boiled and hard boiled eggs are measured in similar ways. Works every time for me. Nice little egg boiler, by the way.