Let’s take a look at the passage in context:
Now large crowds were traveling with him; and he turned and said to them, “Whoever comes to me and does not hate father and mother, wife and children, brothers and sisters, yes, and even life itself, cannot be my disciple. Whoever does not carry the cross and follow me cannot be my disciple. For which of you, intending to build a tower, does not first sit down and estimate the cost, to see whether he has enough to complete it? Otherwise, when he has laid a foundation and is not able to finish, all who see it will begin to ridicule him, saying, ‘This fellow began to build and was not able to finish.’ Or what king, going out to wage war against another king, will not sit down first and consider whether he is able with ten thousand to oppose the one who comes against him with twenty thousand? If he cannot, then, while the other is still far away, he sends a delegation and asks for the terms of peace. So therefore, none of you can become my disciple if you do not give up all your possessions. (Luke 14)
So, you’re wrong: According to Jesus, speaking to “large crowds,” nobody can become his disciple unless they give up all their private possessions/property.
If we read into the book of Acts, we find this:
Now the whole group of those who believed were of one heart and soul, and no one claimed private ownership of any possessions, but everything they owned was held in common. With great power the apostles gave their testimony to the resurrection of the Lord Jesus, and great grace was upon them all. There was not a needy person among them, for as many as owned lands or houses sold them and brought the proceeds of what was sold. They laid it at the apostles’ feet, and it was distributed to each as any had need (Acts 4)
Why did none of these Christians own private property? Why was everything they owned held in common? Because that’s what Jesus explicitly told all of them to do.
So...
Yes, Jesus DID tell “large crowds” of people that they cannot be his disciple unless they get rid of all their private property.
Yes, according to the Bible, Jesus’ earliest followers DID NOT own any private property, as per Jesus’ wishes.
John 12:6 refers to a collectively-owned money bag.