Quality PPC Advertising isn't easy to find. Most of the sites who says that he advertise your site for free aren't serious and only gives you very bad quality visits if they give you some.
You can use it with your credit card or PayPal account.
After years of being a webmaster and try to promote new sites I found Bidvertiser $20 in Free clicks promotion and it really works.
At this way you can start promoting your site for free starting the webmaster steps and the if you get some good results you can buy some pay advertisements.
You only need to signup, confirm your credit card and that's all, then you create your ads and you have $20 in free PCC real visits.
Also you can use PayPal and it's done. You get the free PPC bonus in one minute!
You can get your free $20 PPC advertisements here:
Good ppc advertising depends on a lot of things, the niche of your site, the competence, the search engines, etc.
Ideally you can find a good niche without too much competence and get advertisements related to your site, for example Bidvertiser is good for gambling advertising, casino and poker ads are good enough to make some money.