To Buy a Player for Free: 
First make a bid for the player, but it must only be a cash price, no exchanges or money after
appearances. Once the bid is accepted and you get to the contract stage and it asks whether the
player is indespensible to the club etc. You should click on his name. Next, go to transfers and
you should see your bid; click on it and withdraw it. Make a fresh bid straight away for £0 and
offer it. Then press back and you should still be on the contract stage. Offer a contract as normal
and if the player accepts you will get them for free! 

Become an International Manager: 
Choose 'Add Manager' or just start a new game. Then you will receive a list of teams. Go to one
of the teams and click on a Player. Next to the player's name is his nationality. Click on
'nationality' and you will be sent to the player's national team. Then in the upright corner, you click
on 'take control.' That way you can become manager of any international team.