Space and Time of Universe ! Undecidable Questions like How Old is the Universe and How Big ? When did Time come and How Space !!!

If Space & Time are internal parts of Universe, the questions like How Big is the Universe and How old is the Universe are meaningless questions ! 

If Space & Time are external to the Universe , then there will always be something beyond...So, when one talks .How old is Universe...Means there must be something earlier than Universe that causes  or witnessed the birth of the Universe..so again that way, there will be infinite sequence of many Universes et.c..and one may not never know when those universes took birth or how big !!

And if they are internal constructs of the Universe , the questions like How old Universe and how big would always be unknown or irrelevant questions ..It's like asking When did Time Come ? Or How large is Space ? 

So, Can Time itself in its own frame explain when did Time come ? Or How large Space is ? 

So these questions are like Self-Circular issues like the famous Godel Incompleteness results and they will always likely  be Undecidable or Unknown Statements to know ever by the Human Logic !!