Kriyat HaTorah

1. From the time the Sefer Torah is opened to make the Brachot HaTorah it’s forbidden to speak at all even words of Torah. Giving a halachic ruling is forbidden unless it’s in order to prevent someone from doing a prohibition and it’s impossible to signal to him.
2. Someone who speaks during Kriyat HaTorah is culpable for serious transgressions including disgracing Torah by ignoring listening to Torah, making a Chilul Hashem, potentially Lashon Hara, Rechilut or other forbidden speech, speaking mundane words in a shul and the punishments include having one’s Tefillah discarded and a trangession that’s too great to bear.
3. Even between Aliya’s it’s forbidden to talk but it’s permissible to learn Shenayim Mikra VeEchad Targum and some permit learn other things, yet others emphasize not to learn with someone else between Aliya’s because it may continue into Kriyat HaTorah.
4. Some say it’s proper to read along with the Baal Koreh word by word in order to listen better and have inten, while others say that one should be quiet and listen intently.

Order of the Aliyot

1. If there's no Levi and there is a Kohen in Shul, the Kohen who got the first Aliyah should also get the second Aliyah.
2. The following is the order of those who should get an Aliyah:
   1. A groom on day of wedding,
   2. a groom (who is getting married for the first time) on Shabbat before wedding, a bar mitzvah boy on Shabbat after bar mitzvah
   3. a sandak who holds the baby for the Milah
   4. a sandak who carries baby in for the Milah
   5. husband of a woman who gave birth to a girl if woman comes to shul
   6. husband of a woman who gave birth to a boy if woman comes to shul
   7. groom on Shabbat after wedding if wedding was on Wedsnesday or later, if the groom or bride was getting married for the first time
   8. someone who has a yaharzheit on that day
   9. father of the baby who is getting a Milah on that day
   10. someone who had a yaharzheit in the coming week
   11. mohel who performed a Milah that day
   12. sandak on Shabbat before Milah
   13. father of the baby on Shabbat before Milah
   14. mohel of a baby on Shabbat before Milah

Standing during Kriyat HaTorah

1. It’s permissible to sit during Kriyat HaTorah and such is the minhag, yet some are strict to stand during Kriyat HaTorah (so as to hear it as if one is receiving it from Har Sinai when Bnei Yisrael was standing). During Baruch and Baruch HaMiverech LeOlam VeEd one should stand, however, many don’t stand and the minhag has what to rely on.
2. The Ashkenazic custom is to stand for Aseret Hadibrot, however, the Sephardic minhag is not to stand for Aseret HaDibdrot. If one is in a shul where the Rabbanim are sitting one should also sit and if one is in a shul that everyone is standing one should stand from the beginning for the parsha or at least the beginning of the aliyah.

Learning during Kriyat HaTorah

1. If one already heard Kriyat HaTorah (or one will hear another minyan), there’s 10 others who are listening to Kriyat HaTorah, if he was sitting on the side (showing he already heard Kriyat HaTorah) learning from before the Sefer Torah was open it’s permissible to learn quietly.