Was the Gospel Book form or oral?

Did Jesus receive the Gospel in written or oral form? (Christians in a dilemma)

We know by the very words of Jesus from the New Testament that Jesus received his commandments orally take for instance this verse :

I can of mine own self do nothing: as I hear, I judge: and my judgment is just....

( John 5:30)

Notice how Jesus is confirming that his message is given orally, also did Jesus ever speak about any book which he preached? Is there a mention anywhere in the New Testament where Jesus wrote on scrolls and gave them out, or told his disciples to write on scrolls where he spoke? And the answer is no In fact we have no evidence from the gospels where Jesus ever wrote anything? 

Just for the records if one brings up in gospel of John Jesus wrote on the floor, first point is we don't know what he wrote on the floor john doesn't mentioned what it said he could of just scribbled for what we know, secondly point and the most important is that the chapter of the adulteress women is a later addition possibly added a 1000 years later the entire chapter is a forge never  existed the first place, which concludes that no other part in the gospels does Jesus write anything nor does he carry and scrolls or parchments or even a book for that case even though codex were not available..

Now Christians often tell us you Muslims claim that the Injeel (Gospel or in their case gospels ) has been corrupted and it's not the originals so where is the original Gospel of Jesus Pbuh.? It's a valid question but with a little bit of intelligence this same question backfires on the Christians let me explain..

We've already gathered from the gospels that Jesus never wrote anything nor did he travel with scrolls of parchment nor did his disciples write anything he said word for word as dictated ? Which means everything Jesus Pbuh said was oral he only preached he never walked with an actual book.. What does Gospel mean Good News right so he was Preaching the Good News in different locations, We are told that Jesus preached his Gospel : (Mark 1:14) (Matthew 4:23) (Matthew  9:35) note preaching his Gospel not gospels and what are those alleged gospels we have now? 

The gospels we have now are the biography Jesus an account of what he may have done through his ministry, note the authors don't claim to be eyewitness rather they are only telling their side of the story take for instance Lukes opening  :

1Many have undertaken to draw up an account of the things that have been fulfilled^a among us, 2just as they were handed down to us by those who from the first were eyewitnesses and servants of the word. 3With this in mind, since I myself have carefully investigated everything from the beginning, I too decided to write an orderly account for you, most excellent Theophilus, 4so that you may know the certainty of the things you have been taught. (Luke 1:4)

From the above Luke is explicitly telling the readers that he is not an actual witness or does he claim to be rather he's taking information from others who apparently witnessed Jesus's ministry but does not name them ?

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This should be clear that Christians should quit asking Muslims where is the Gospel of Jesus when their own bible testifies that Jesus never had a Book Christians are making a mistake when they are looking for a Book when Jesus spoke or preached everything orally, if this wasn't the case why don't we have a book like Moses had the Pentateuch? Wether it was written by Moses or not Jews claim this was the book Written by Moses which his followers also had a copy..

So next time Christians should not bring up where is the Injeel or Gospel of Jesus Pbuh because it's going to only backfire on them.