1. No, I just read what people saying and try to satisfy it, well, more or less. Blaster asked for third rail and since it is based on electric rail it has same max input. SpwnX offered that magnets will accept MV by default, so it is. There probably should be some subtypes like HV magnets and constant magnet based on Neodymium magnets or something else, hovewer I don't want to add new ores, need to think about it.
2. No, only electric rails (tracks) do this. Third Rails and Maglev Rails don't transfer energy to each other, you need to power them from below - you may put batboxes for each of them, but I guess will want to simply put cable. ))
BTW if you simply made it continuous IC2 EnergyNet will eat all memory and stall. To avoid it you should separate it into sections with transformers. For fiber cables best way is to put transformer at each 40 block, that way you will also get rid of conduction lossess:
<< 39 cables >> << 39 cables >> ...
3. It already done for electric rails, it just not so frequent because if you made long railway it will spam a lot of particles. Try to make linear way of electric rails up to horizon and power them in creative.
Please show the screenshots, how to build these monorails. I do not quite understand this.