Question: 1. Would it be possible for non-human apes such as chimpanzees,
gorillas , and orangutans to take the place of humans?
2. Like in the 1968 movie “Planet of the apes”, would it be possible
for apes to discover fire, agriculture and create complex
civilization?
3. Would they be able to communicate like we do? In a few thousand
years would it be possible for these apes to be able to travel
through space?
4. Also, in this world could humans take the place of modern day apes?
Climbing in trees and those sorts of things.

Are any of these things possible? Please let me know

Answer: 
As question is posted answer is "NO".

Apes, as we have them in real Earth, cannot "take the place of humans".

In spite of having a genome 98+% equal to humans chimpanzee still lack that 2% enabling them to fill the gap.

The "gap" being ability to devise and use effectively a complex language capable to describe objects not previously known to listener (many animals are able to associate sounds to *known* objects/actions/situations, but that is not enough to trigger "civilization").

Of course, given a few hundred thousand years (a very short time, as evolution goes), some of the higher primates could evolve into *something* "human-like", but:

* Such an evolved ape wouldn't be an ape anymore, just like we aren't.
* Such an evolution is bound to touch other aspects of the "new ape", not only its brain.
* It is absolutely unlikely several different species would evolve "in parallel", just like it happened in the past: one branch evolved while the others took different directions.
* Having a world where all different species of apes "become intelligent" without any other physical changes is absolutely unrealistic.
**No**  

Is it possible for non-human apes to take the place of humans?
Well eventually after millions of years of evolution yes. Otherwise no.

Is it possible for non-human apes to discover fire, agriculture and advanced civilization? No. Non-human apes do not have sufficient intellect and intelligence.

Apes in space? No with the exception of Ham the Chimpanzee who did travel in space in the 1960’s, but was sent there by NASA. Needless to say Ham played no part in the rocket science program that put him into space.

Could humans take the place of apes?
Not really. Although humans can climb in trees they are not adapted for a life in the tree canopy and would have no desire to live there.