Would i rename each TV episode like this for example (S2.E1 Diamonds 'n dust)
No, they would be like "The A-Team s02e01.mp4" .. the filename must contain the show, series number and episode number. Any other info like "- Diamonds 'n dust" is ignored by online scrapers. You can use e.g. s01e01 or S01E01, the casing doesn't matter.
NB: The Kodi wiki is quite clear on this stuff, and you either follow the naming conventions needed or have issues with scraping things to the library. It is technically possible to tweak the regex's used by the scrapers to suit custom schemes, but if you have to ask how that's done you have no business trying to use that feature!