Hello doironijs233,
Depending on the site you are playing at you can get both the starting capital & future bonuses (e.g. on Mansion or Titan you can use a first deposit bonus even if you received the capital). You used to be able to also do this on PartyPoker but I am not sure of their current regulations. Their support will probably be able to tell you if you currently still have an open first deposit bonus.
As for rakeback; PartyPoker is a site that has a loyalty program. This is kind of like rakeback - but conceptually different in that your rakeback increases the more you play and the longer you play at the site. Everyone that plays there participates in the loyalty program - which co-exists next to any bonuses you are currently clearing.
For more information on our partner rooms and their loyalty programs or the rakeback we offer, go here: http://www.pokerstrategy.com/online-poker-rooms/
Best regards
SoyCD