I desperately need help with this pattern
I'm working on a cardigan and it tells me to do 5 rows in garter stitch which I did and then it says Change to stockinette stitch and increase 1 stitch each end of needle every 3rd row 0(0,0,6,0) times, then every 4th row 6(13,10,9,15) times then every 5th row 5(0,3,0,0) times. I'm working on the 2nd number in the parentheses so it's 0, 10, 3. My question is what do I do with the first number which is 0 do I go down every 3rd row 6 times without increasing and then start with every 4th row increasing 10 times? Also I have another question. If a pattern gives you the largest size as a size large and you want to go up a size how much more do you cast on per size you want to go up? Please help me so I may continue this pattern. It seems like I'm always asking for help on here and everyone is such a big help. Thank you.