I've mainly just used *alle* or *alles* up until now to represent *all* or *every*. 

However there are multiple declinations for "all" that are quite confusing (including *aller*, *allen*, *allem*). But then in other examples, one can also just simply use *all*. 

For example:

> 
> ALLE Hunde essen Fleisch 
> 
> 
> ALL meine Freunde lesen Bücher
> 
> 
> Er kann ein Haus kaufen mit ALL seinem Geld 
> 
> 
> Ich habe ALLEN bescheid gesagt, dass... 
> 
> 
> ALL die schönen Blumen. 
> 
> 
> 

My subsequent questions are as follows:

1) Why is "all" used here in *ALL meine Freunde lesen Bücher* and *Er kann ein Haus kaufen mit ALL seinem Geld* and not "alle"?

2) Why has it changed to "Ich habe ALLEN bescheid gesagt, dass..."?

3) When then with examples if possible, does one simply use *alles*?

and 4) why is it:

> 
> alle meine besten Freunde
> 
> 
> 

but 

> 
> all der Wein. (both sentences seem to say "all of the etwas..")
> 
> 
>