ITunes help, anyone? Please?

Ok, so I just got a new laptop, and when I connect my iPhone to it, all that comes up in iTunes are the songs I have actually bought, not the ones I've gotten off CDs. I don't know why that is, as they were all on my iTunes account on my previous laptop and I would like to find some way to get them back there (I can't just put the cd in again as there isn't a cd drive in this laptop) in case my phone crashes. Any ideas?
Also, I downloaded some music tonight and it's on my iTunes and all, but when I try and sync it, it doesn't come up on my phone. How would I fix that?

You need to move iTunes Library between computers.iTunes sync only music that you purchased from store but didn't sync ripped CDs.