Do I need to spend money (e.g., PPC, paid advertising, etc) to make money with affiliate marketing?

Yes You Can Advertise Free and Yes It Does Work but I get bigger results with sites being a Paid Member.

You do not have to, there are many free advertising sites, however bear this in mind, You only get what you pay for - or what you don't pay for.

sales microwave drying equipment.

I am also looking for this.. this will definitely help me....

I use viral marketing sites, list builders and freeadboards. I also have a blog which I continually promote. If I were you I wouldn't spend money in the beginning especially if you are new.

@Sotirios PTCs and TEs do not have the best traffic you can get and I wouldn't spend time or money to get traffic there.

Yes need for quick result. One more thing that money make money!

it depend....if you want quick results you have to pay,if you don't i suggest you to use their money for your ads by clicking other PTC ads or to spend your credits by surfing on TE

Absolutely not! There a many places all over the internet that offers free advertising accounts that which allow you to earn from referring others who actually do pay for these things.

However, you get better results if you do.

No, you do not "need" to do that, but it is highly recommended to try to create profitable paid traffic campaigns...

Sometime we have to spend money on it. But our working hard is the most important point.

WIth PPC I really like to purchase some credits to get my account going. Then I try to surf as much as I can to keep those credits built up.

Not necessarily, It might make it faster for you but there are many great ways to get your links out there for free. You might want to check my resource about free advertising to your business.

Depend....not all the time.

It would not hurt unless your broke