Q1: Can I ignore the color requirements when I use this card's When Digivolving effect or inherited effect in order to use an Option card with {{EffectLinkArchetype|Plug-In}} or a yellow Option card?
No, this card's When Digivolving effect and inherited effect don't allow ignoring color requirements, so you can only use cards that meet the color requirements.
Lv.5 Taomon BT17-035 C Ultimate | Data | Wizard <Barrier> [When Digivolving] You may use 1 Option card that has [Plug-In] in its name or is yellow from your hand with the cost reduced by 2. --- Inherited: [When Attacking] [Once Per Turn] If this Digimon has [Sakuyamon] in its name, you may use 1 Option card that has [Plug-In] in its name or is yellow from your hand with the cost reduced by 2.
Lv.5 Taomon BT17-035 C Ultimate | Data | Wizard <Barrier> [When Digivolving] You may use 1 Option card that has [Plug-In] in its name or is yellow from your hand with the cost reduced by 2. --- Inherited: [When Attacking] [Once Per Turn] If this Digimon has [Sakuyamon] in its name, you may use 1 Option card that has [Plug-In] in its name or is yellow from your hand with the cost reduced by 2.
Lv.5 Taomon BT17-035 C Ultimate | Data | Wizard <Barrier> [When Digivolving] You may use 1 option card that has [Plug-In] in its name or that's yellow from the hand with the cost reduced by 2. --- Inherited: [When Attacking] [Once Per Turn] If this Digimon has [Sakuyamon] in its name, you may use 1 option card that has [Plug-In] in its name or that's yellow from the hand with the cost reduced by 2.
Lv.5 タオモン BT17-035 C 完全体 | データ種 | 魔人型 ≪防壁≫ 【進化時】自分の手札から、名称に「プラグイン」を含むか黄のオプションカード1枚を支払う使用コスト-2で使用できる。 --- Inherited: 【アタック時】[ターンに1回]このデジモンが名称に「サクヤモン」を含むなら、自分の手札から、名称に「プラグイン」を含むか黄のオプションカード1枚を支払う使用コスト-2で使用できる。