It's hard to answer some of the questions that info-seeking potential homeschoolers ask, because I truly believe that the best advice is for them to actually do the research on their own. There is no better way for them to understand what homeschooling is about, and to understand that there are a ton of different ways to go about it.
I always check http://cathyduffyreviews.com/ whenever I am considering new curriculum or materials. I don't buy her book, because I feel that it isn't necessary, but her reviews are very helpful in determining if something is a good fit for us.
Here is a free, secular online curriculum for preK - 12. It has a new parent account that allows you to print reports and closely monitor your children's progress, and it will soon let you choose different grade levels for different subjects. Some of it will not be useful for non Americans, but a bit of it is relevant: http://discoveryk12.com/dk12/
Easy Peasy Homeschool is free and has some good content, but it is heavily indoctrinated with a Christian world view. https://allinonehomeschool.com/
I use http://www.homeschoolbuyersco-op.org/ to get great deals on curriculum. I always check there first before I buy anything.
Here's a link to a good explanation of some of the different approaches to homeschooling: http://thepioneerwoman.com/homeschooling/five-different-approaches-to-homeschooling/
Discovery Education Streaming Plus is an awesome resource for videos on just about any topic, nicely indexed and organized for easy searching. I bought a subscription through the Co-op. http://www.discoveryeducation.com//what-we-offer/streaming-plus-digital-media/index.cfm
I've just recently discovered this free resource for educational videos, but I haven't checked it out extensively yet: http://www.watchknowlearn.org/
