tracing – Data visualization 4d

I am very very new in Mathematica (I downloaded it 1 hour ago). I have a set of 1000 rows, 4 columns of data, in a CSV file:
The data

My first problem is that I do not know how to select the columns of the CSV file that I want to plot.
My second problem is this: I created another CSV file containing only columns 1, 2, and 3 of the attached data file. However, the graph obtained does not make any sense in my opinion:
Sample chart with columns 1, 2 and 3 of the attached data
It seems that the adaptability is ignored: all points higher than 0.1 do not seem to exist.

Finally, I would like to add the 4th line of my data file in this graph. Like a color gradient for example. Is it possible to do it?

Thank you so much!