The central rule of the track. When you mean to him, for her, and so on, the four l-words collapse into two.
lo / la → le · los / las → les
Compare: lo doy is I give it. But I give her does not mean picking her up and handing her over: it means I give to her, so it takes le.
Les doy algo · Le he hablado · Le hemos hablado · Le han hablado · Les han hablado · Le hablo · Les hablo · Les hablan
Note how many meanings le carries: it can come from lo or from la, so le hemos hablado is we have spoken to him, to her, or to you formally.
Only the l-words shift. Me, te and nos already carry every meaning: me, to me, for me, from me, myself.
Le cocina algo · Les cocina algo · Los cocina (the things he is cooking) · Las cocina · Nos las cocina
Do not look for a direct translation of whether English used to or for. English is inconsistent about it anyway: I listen to him, but I hear him.
To realize is to give yourself account. Cuenta is something like account, so it is close to the English to take account of.
¿Te das cuenta? is used a lot conversationally: do you realize? do you know what I mean?
¿Me lo darán? · ¿Me la darán? · Te darán algo · Te lo darán · Nos lo darán · No nos lo darán
English uses will you give it to me? as a polite request, meaning can you. Spanish ¿me lo darán? does not do that. It is a literal question about the future: are you going to give it to me?
For the request sense, use can you instead.