I want to make a free classifid ads website and use adsense for making revenue and i will make space

wow, I think that is a great idea. Creating a free classified website should bring massive traffic once it's listed in the Search Engines. How would you go about creating such a website? I'm curious.

mailxpress

It probably won't make money in the short time, at least not much. It will take several months before people find it and start using it. You'll be competing against the great craigslist which will be hard and they don't even have ads to speak of there. I would recommend making it only for local classifieds and marketing it in your local towns and see how that goes.