Hi and welcome to KH!
I removed part of your post 'cause due to copyright laws KH can't have full patterns posted. You can post a section you are having trouble with and the link to the pattern though
For this section (yb, k1, yf, sl 1) 4times
yb means yarn in back so when you do the K1 you are right your yarn is already in the back. yf means yarn forward so they want you to move your yarn forward before you slip the next st. They want you to repeat this 4times.
(yb, sl 1, yf, p1) 4 times
Here they want you to move the yarn to the back when you slip the sts and then move the yarn to the front for the purl (which is how you work a purl st)
Mostly they are telling you how they want the yarn when you slip the stitches