Hi, welcome to Knitting Help.
1 Inc 1 st at each end of row (14sts)
Your first row is to be knit and you increase 1 st at each end which will give you 14 sts. Your next row is to be purled.
Unless otherwise specified, you can use knit front and back (kfb) or any increase of your choice. Whatcha knittin'?
You can't knit the left sock first. Ever.