Student or Learner
1) If the interviewer asks me “What will you bring to our company?”,which sentence can I say?
2) Are both sentences polite?
I would like to bring your company a hard working future accountant.
A hard working future accountant is what I will bring to your company.
If you are talking about yourself, don't say you are "bringing" an accountant.
You bring your skills, knowledge, dedication, and commitment to be the hardest working accountant they have... something like that.
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.