You have asked two confusing questions. 1. you want to sell the domain. You want to know as to where to sell them. 2. You want to earn money through your website. A1: Go to sedo.com, moniker.com, afternic.com, namedrive.com, dnforums and list your domains there for sale. A2: Park your domains with sedo or namedrive. OR put some good content and then place adsense or bidvertiser, etc ads.
I would suggest you educate yourself a little on websites creation and / or domain names buying and selling techniques for that just acquire some books about those matters online read them and then make your mind on giving your ideas a go or not. I know... It can sound long and complex but the process is just the right way to make things for real and sustainable success. Regards Maurice