Jesus was actually a huge fan of swords.

Inasmuch as a sword, in particular, a two-edged sword is a symbol for the Word of God (Ephesians 6:17; Hebrews 4:12). In turn, Jesus is also called the Word (John 1:1-3; John 1:14; Hebrews 11:3; 1 John 1:1-3; 1 John 5:7).

I bring not peace but a sword

With respect, that is a paraphrase of Matthew 10:34. It's important to note the context.

"Think not that I am come to send peace on earth: I came not to send peace, but a sword. For I am come to set a man at variance against his father, and the daughter against her mother, and the daughter in law against her mother in law. And a man's foes shall be they of his own household. He that loveth father or mother more than me is not worthy of me: and he that loveth son or daughter more than me is not worthy of me. And he that taketh not his cross, and followeth after me, is not worthy of me." Matthew 10:34-38

In other words, Jesus was saying that His coming would result in strife among people, even families, with those who've accepted Him being persecuted by those who haven't.

A man who owns a coat but no sword should sell his coat and buy a sword

Also a paraphrase. Here's the context in Luke 22:35-38.

"And he said unto them, When I sent you without purse, and scrip, and shoes, lacked ye any thing? And they said, Nothing. Then said he unto them, But now, he that hath a purse, let him take it, and likewise his scrip: and he that hath no sword, let him sell his garment, and buy one. For I say unto you, that this that is written must yet be accomplished in me, And he was reckoned among the transgressors: for the things concerning me have an end. And they said, Lord, behold, here are two swords. And he said unto them, It is enough."

This discussion occurred on the same night that Jesus was arrested. Later, when Peter used one of the aforementioned swords to cut off the ear of one of the guards, Jesus admonished Peter and told him to "Put up again thy sword into his place: for all they that take the sword shall perish with the sword" (Matthew 26:51-52; John 18:10-11). Evidently, Jesus didn't mean for His disciples to literally go out and purchase swords. When He said "It is enough" as recorded in Luke 22:38, it wasn't an affirmative "That is a sufficient amount of swords," but rather "That's enough of this conversation." Also, there's no mention of the disciples carrying or using swords afterward during the events recorded in Acts or elsewhere.