[Manga] Fullmetal Alchemist: Manga edition

I didn't see the manga but I saw the entire series.

I have some questions:

Spoiler:

1) What happened to Gluttony and Lyra?

2) Why is it that the evil commander is still alive + robotic part after the forging of the philosopher stone. I thought he was dead among all the other people.

3) Is Dante a good person or a bad one? She is the teacher of Izumi but then I saw she was the leader of the creatures from hell.

4) I didn't really understand why Edward's father couldn't come back to the alchemist's world where Edward still could.

5) Why does Envy hate Edward's father so much?

6) What's the meaning of the green dragon in the last chapter?

7) Why didn't Edward get his hand and leg back at the end?

8) Which one is true? Getting a thing requires something (Edward), or the getting something doesn't require anything (father).

9) Why did Scar kill Nina-dog?

10) So it is true that when one dies, he can never be revived, unless his soul is still there and unless you use the stone. This is how Alphonse revived Edward. So why could Edward revive his brother again? This means Alphonse was never dead???

11) Those hellish creatures, are they just the people from the other world?
I don't understand why Edward keeps saying they don't have souls, if they don't have souls, then what do they have? They certainly have bodies and even memories from people from the alchemist's world.

12) I don't understand a thing from the triangle: Wrath - Edward - Izumi

Tell me where I'm wrong:
Izumi had a dead baby, tried to revive it and received an ugly baby? Is that ugly baby = wrath? Izumi gave her intestins and received wrath. Then she gave wrath back to the other world and then Edward tried to revive his mother and the ugly baby who has legs and arms stole Edwards leg and arm.
I don't understand what happened to the ugly baby. That ugly baby had arms and legs, how could it then steal another leg and another arm from Edward?

13) At the end of the series, Edward's father says something about, when you perform alchemist's things, you have to use energy from the other world in return, what does that mean?

14) Is there anything in the manga that says where the skeleton of Gluttony and Envy is and how did they come to this world?

15) What's with this baby being the portal and all? I even didn't remember when that baby was born...

16) Why was Lust suddenly pinned to the wall by the evil leader, and how??? She didn't have her skeleton.

17) Why did the evil general know that there was a skull in that case? And who hid it? He couldn't possibly put it there himself because he wouldn't be able to move. And if he knew that skull was in there, why did he give it to that kid? Absurd.
BTW, who is that skull from? The general? This can't be because it's the evil general who killed the good one. The evil general already existed when the good general was still alive. So who summoned the evil general and who is this skull from? Ok, I'm really, really confused now.

18) Did you find the ending sad? I did. By the way this is the best anime I've ever seen. So, do the brothers get back after all in the manga?

Jam it back in, in the dark.

Oh sorry, I just searched for Full Metal Alchemist and only found this thread and I thought people who read the manga already watched the whole anime so they could be able to answer my questions.

Also I didn't find another thread for Full Metal Alchemist so I would have to open a new thread for my questions and that's not a thing moderators like. (I only found FMA the movie)

But it seems I don't have a choice, I'll open a new thread then...

There's nowhere I can't reach.