First of all, to make money from blogging... you should get a self-hosted one. Then, create great content to drive organic traffic. Convert that traffic to build your list. And sell stuff on the back-end. Your focus should be in building a list if you want to make enough money to buy a car. Also, for traffic... you could try guest blogging, blog commenting, article marketing with a focus on syndicating it, solo ads are a great and fast way to build your list. In order for your visitors to opt-in you also need to give them an ethical bribe - something for free such as a report etc. to lure them into your sales funnel. Hope it helps. I suggest read more on how other top bloggers make money from blogging. Adsense is a nice way to start with in order to monetize. But to make a living from Adsense you will tens or even hundreds of sites.
First, be focus on offering unique and quality content for your target readers-- this is the foundation. Even though you got AdSense but the content is not good, it will not get support from readers. Then once the blog is already established, money will just come. Good luck to you. You can do that.
Sivric, The recipe to become a successful and popular blogger is very simple as it is - do something special, stand out from the crowd. You can get on a bike, travel around your country and blog about it. And the chances are a lot of people would be interested to read about your adventures. Your blog won't attract much traffic just because you ask people to buy you a car. You should start doing something unique and special!
I would suggest getting some sort of product for your niche. Most people want something for their money. Or try an affiliate program.
Depending on the topic of the blog you can consider adding affiliate links in your posts or promoting stuff from amazon. But for the adspace in the blog go for Google and try to sell is directly to interested advertisers as this will enable you to earn more from the same spot.
I own a website and I get revenues from advertisers that advertised on my blog and Google adsense.. The key to success is content. It should be original, latest and friendly. As a newbie, I would advice you to see http://signup.writersplan.com/ . They use our scientifically designed algorithms to let you know what would be the hot topics in the coming days so that you can leverage on them to build your audience, gain traffic and clicks. It is free at the moment and is offering discounts.
This depends on your niche then. Really if your blog niche is popular enough so that people spend money on it, then you should not have any trouble finding a product for it. Perhaps start another blog and promote a product.