Your questions are already answered on this thread; that's why I didn't reply to post #19.
1. Regarding the resistance of the primary of the mains transformer.
In post #11 you said you measured 0.00 with the meter set on 2000k. That's the wrong range; in post #12 I said that you should use the 2k range. That could be marked 2000 or 2k or 2kΩ, but not 2000k.
2. Regarding the voltages across the electrolytic capacitors.
In post #12 I said to measure the "DC voltage" across the capacitors. Therefore you set your multimeter to a DC voltage range, in a section that's probably marked "DCV" on the selector switch. Also in post #12 I said that the 200V range should give you a reading. In post #15 and post #17 Gryd3 explained that if the meter shows a reading of 0.00 or a small number, you should choose a lower range.
For example, when the meter showed 0.00 on the 2000k range, you should use a lower range. That would be the 200k range. If the number is still zero or small, use the next range down, which would be 20k, and so on. If you go too far, the display will show "1 ." or something similar, which tells you that the range you've chosen is too low. So you go up one range. This will give the most accurate reading.
This applies with all ranges, not just resistance.
The multimeter will not be damaged by overvoltage though. So just set it to any range on the appropriate section ("Ω", "DCV", "ACV", whatever) and go from there. If the display is zero or a low number, go downwards in ranges. If it's "1 .", go upwards in ranges.
Current ranges are a bit different. We haven't needed to use those yet, but we may do in future. If you upload a photo of your meter, I can give you details of how to use it to measure current.