Help with this pattern

hi, I need some with this pattern.

It’s for the “knit Yoke” part

I know I have to do a long tail cast for x amount of stitches but what I don’t understand next is

Work up the following set up row part.

Am I to purl x amount of rows and then once that all completed I start with row 1 or do I start with row one after I cast on?

Thanks in advance

Cast on and then work the set up row. This will place the markers that you need for the next row’s increases (row 1). Work row 2 and then repeat rows 1 & 2 for however many times for your size.

So for example I would purl 11, place marker, purl 6, place marker and so on?

Yes, that’s the set up row.