1)underwater soil heating
2)Research Centre which gives you 7 red packs every 4 days
3)Sports Complex which gives you 7 green packs every 4 days
4)Yes that's the last one

You'll get 2 youth players in 12 days of time,the two guys coming from the academy will be totally random....the token one will always be either a 3* or a 4* player,the free one will be 2* most of the times.