Hello,
I have about 50 domains, 15 of them are not in use, i just registered them at my eNom reseller account.

how can i earn money with those domains, or how can i get more trafic for them..?

If they receive typi-in or search engine traffic, park them somewhere - Sedo, NameDrive, RevenueDirect etc..

parking, but dont w8 many money

I use NameDrive, they do payout with paypal or bankwire.

I have 4 domain names, and earning ~$50/month. But you need have some traffic to your domains.

i suggest you to read this forum namepros.com there are a lot info of domain revenue

Develop them.