You always have to say the former, "". If you want to say you want to do two things in succession, you should use only one .
You can safely use as the te-form for reason/cause, for example:
>
> I wanted to play a game **so** I woke up early.
You may use two 's when you list two independent desires, for example:
>
> I want to be rich, and I want to be famous, too.
>
> ( (using ) would be more common.)