Bonus troops from controlling continents and trading cards for troops in Risk
Per the rules


You gain bonus troops for each of your turns you start while in control of the continent 



  In  addition,  at  the  beginning  of  your  turn  you  will  receive
  armies  for  each  continent  you  control.



Yes, you get the base count, plus any continent bonus, plus the value of the cards you trade in, plus 2 bonus troops for trading in a territory card you occupy. 



  At the 
  beginning of each turn, calculate how many new armies you’ll add to your territories based on ...
  
  
  The  number  of  territories  you  occupy;
  The  value  of  the  continents  you  control;
  The value of the matched sets of RISK cards you trade in;
  The  specific  territory  pictured  on  a  traded-in  card.