What it the meaning of 「ついてる」　in　「いろいろ機械がついてるでしょう。」
The whole dialogue is :
「お兄さん、お兄さん、あの機械はなんなの。」
「あれはね。いろいろ機械がついてる」

I tried to look for 「つく」 in the dictionary, but there are so many kanji attached to it, and so many meanings that I can't really make a reasonable choice.

If I had to guess, I would translate it as : "There are a lot of different machines here".

Question

What it the meaning of 「ついてる」　in　「いろいろ機械がついてるでしょう。」
The whole dialogue is :
「お兄さん、お兄さん、あの機械はなんなの。」
「あれはね。いろいろ機械がついてる」

I tried to look for 「つく」 in the dictionary, but there are so many kanji attached to it, and so many meanings that I can't really make a reasonable choice.

If I had to guess, I would translate it as : "There are a lot of different machines here".

Answer

In this context, 'つく' will mean 'to be attached.' What he meant was that there are many small machines or parts attached to a big one.
I hope this helps you to understand the video.

Answer

For more detail and context, here's the source : https://www.youtube.com/watch?v=eTwLaJhmr40　(1:40)