I use a toothbrush and a few different types of paintbrushes to clean the dried dirt/sand/grass shavings off my tank when done driving. I also use a can of compressed air or my compressor to clean out the inside of the tank and the tracks. A little bit of white lithium grease applied to the gearboxes will handle most of the maintenance there. Just make sure to look at the gears every once and a while to make sure they are clean. The tracks need to be a bit loose, but not so much that your track jumps off the drive wheel. You did get the Torro KT right? It has adjustable idlers for each side of the tank to get the track tension where you like it.
Once your tank comes in, PM me and I'll make you a video on how to adjust for that model. As for the wiring diagrams....

Here are the main three you will need. If you have any other questions please ask