Q1: Does this card's Your Turn effect trigger when this card is in the breeding area and would digivolve into a multicolor purple or yellow Digimon card?
No, it doesn't trigger. Only effects with the Breeding icon trigger and activate in the breeding area.
Lv.3 Liollmon BT18-075 C Rookie | Vaccine | Holy Beast [Your Turn] [Once Per Turn] When this Digimon or any of your Tamers would digivolve into multicolor purple or yellow Digimon cards, reduce the digivolution costs by 1. --- Inherited: <Retaliation> (When only this Digimon is deleted in battle, delete the Digimon it battled.)
Lv.3 Liollmon BT18-075 C Rookie | Vaccine | Holy Beast [Your Turn] [Once Per Turn] When this Digimon or any of your Tamers would digivolve into multicolor purple or yellow Digimon cards, reduce the digivolution costs by 1. --- Inherited: <Retaliation> (When only this Digimon is deleted in battle, delete the Digimon it battled.)
Lv.3 Liollmon BT18-075 C Rookie | Vaccine | Holy Beast [Your Turn] [Once Per Turn] When this Digimon or any of your Tamers would digivolve into a multicolored Digimon that is {{Colour|purple}} or {{Colour|yellow}}, reduce the digivolution cost by 1. --- Inherited: <Retaliation>.
Lv.3 レオルモン BT18-075 C 成長期 | ワクチン種 | 聖獣型 【自分のターン】[ターンに1回]このデジモンか自分のテイマーが紫/黄を含む多色のデジモンカードに進化するとき、支払う進化コスト-1。 --- Inherited: ≪道連れ≫(バトルでこのデジモンだけが消滅したとき、バトルした相手のデジモンを消滅させる)