Hello louisekfeb17,
Welcome! Im a mother of 3 boys and 2 of them are early readers in English, French, Spanish, and Chinese. The earlier the better. Its also easier to set up a routine the earlier you start. I started my third son at 2 1/2 months and he loves it (now 3 months). Always smiling and responding joyously to it. I would actually start with the free flashcards print outs first since you will be more involved. Also try out the free trials first.
Newborns have the capability to absorb and identify more than one language so definitely speak, sing, and read as much as you can in any and all languages you want them to learn. The baby's eyes should be ready to do flashcards and littlereader by 3 months. I would definitely show your family how amazing it is with the flashcards and start earlier. The response is amazing. I remember my other 2 sons going into a crazy fit of excitement when they were about 5 months old. My husband was a bit skeptical at first as well but now he loves to help teach it.
Once you buy the LittleReader curriculum, you will have it for a lifetime. It is a year long curriculum.
Many of the videos you see on here with children reading in multiple languages also did many other programs/or were multilingual and some of them went without introducing tv. You do not need to buy other programs but you do need to set out a good chunk of time. I would buy plenty of books and use as many of the free flashcards as possible even if you buy little reader. Also, I would definitely print out and use the English alphabet cards but use them for phonetics. Do not teach the letter names because it will slow down the reading process. Since you are bilingual your baby will be set for learning both languages.
Read as many articles and books possible for teaching. It helps quite a bit. I would read Glenn Doman and the little booklet on here to start off first.