For resistance and volt checking its easy. Set to volts dc (line above dots for dc, wavy line for ac) and touch black to negative red to positive and you've got your volt reading. You want the setting closest to 4.2v (could be ten or twenty depending on meter) for resistance leave the probe wires in the same holes, select the ohms setting (could be an omega sign) it'll probably be the ten ohm setting you need. Touch the leads together and note the reading, touch to the negative screw and positive screw, note the reading. Subract the first reading from the second and thats your resistance.
If this is not clear I'll take sone pictures for you.