Where we see how to say the kanjis of the first lesson?

The premise of the book is to isolate the study of readings (or "HOW TO SPEAK"), from that of the writing and meaning and hopefully make the task a great deal easier in the process.

I suggest you read the introduction to the book.

Remembering the Kanji ebook

Quick answer: In book 2. You are supposed to (according to this kanji learning style) first finish book 1 to learn the writings and meanings - this can take anywhere from 3 months to over a year. After that you learn how to pronounce the kanji in book 2. You may choose to do some parallel study if you want (book 1 and book 2), but it's probably inadvisable to try to use the Japanese pronunciations (in book 2) as a way of remembering the written forms of the kanji (in book 1) - unless you are already reasonably fluent in Japanese.

I'm not into book 2 yet myself, but hope to get there soon