The Graveyard is part of the Playing Field. When a card states "...on the field...", it is referring to cards that are placed in the Monster Card Zone, the Field Spell Card Zone, and the Spell & Trap Card Zone.
It is part of your 'playing field', but when something refers to 'cards on the field' it only refers to cards in the monster zones, Spell/Trap zones, and the Field Spell Card zone.
Yes, you may pick Dragons from both your side of the field or your graveyard.
go to the graveyard and click on the Mausoleum and select "get part time job" your sim will then have a part time job at the graveyard.
Yes, you can banish one from field and one from graveyard for example.
It is oddly worded if you think about it, but it does gain ATK for dragons in both the opponent's graveyard and their side of the field. I think the 'each' part is more important, the phrase could be worded as "For dragons that are on the opponent's field, or in the opponent's graveyard, this card gains 500ATK for each".
Yes because Gemini monsters are treated as normal monsters while on the field or in the graveyard
You must be able to remove at least one Light Machine monster from either the field or one from the graveyard. So it doesn't matter if you have no Light Machine monsters in your graveyard, you could summon it by removing only ones on your field - and vice versa.
If Dimensional Fissure is on the field then all the monsters are removed from play except for spells and traps, if you have an Imperial Iron Wall on the Field then everything goes to the graveyard
No.You can put monsters in the graveyard only when your monsters are defeated.
XYZ material that is detached is sent to the graveyard, unless a card effect says otherwise.
The monster will always return to its owner's Graveyard. Incidentally, if the effect of the destroyed monster activates while it is still on the field, you will be able to use it; however, if the effect activates in the Graveyard, the card's owner will control the effect.
"The Rock Spirit" can only be Special Summoned from the Graveyard, if it was Special Summoned from the Hand via its effect first. In other words, if it was "improperly" sent to the Graveyard, such as by discarding from the Hand, it cannot be Special Summoned from the Graveyard. If it was successfully Special Summoned by its own effect onto the field and is then sent to the Graveyard, it is then elligible to be Special Summoned from the same Graveyard. However, if it's Special Summon was negated by a card effect such as "Solemn Judgment" and sent to the Graveyard, it cannot be Special Summoned from the Graveyard.