Thanks for your list I found some useful stuff , But I found nothing about how to make monsters die after they are defeated .
I have also a few more question , Today i found out that in all my maps Things threes , mountains , water and walls had no more collision and People could walk over them , is it normal ? am I supposed to make an Event for collision only on every box ?
1) Yes, it is there - it needs switches and multiple event pages. After the battle you need to control a self-switch ON, and a second page without the monster sprite and battle processing that is conditioned to that self-switch.
2) Your tileset is configured wrong - you need to set the passability for your tileset correctly in the database, and don't use events to block movement.
However, that you didn't see them is not surprising given the date you asked and today.
If you read even a bit into the starting point, you should have found my comment that simply reading or watching a tutorial is alwas a waste of time.
You need to work through a tutorial if you want to learn what this is about, doing the same steps yourself in a tutorial project of your own - and that takes time.
By my estimate and several comments from people who did that, you'll need about a month to work through everything in my starting point.
And this month is not something you should skip - it will speed up your later game making a lot.
So please take that time to work through it - even the most common mistakes done in tileset configuration are listed in those tutorials.