At this point, you have an idea or you have already started your company. To move things forward, you have realized that you need equity (risk) capital to finish your development, build your team, mass produce your product or launch a marketing campaign.
Who can you turn to? The scenery is a bit confusing at times.

While in the beginning, friends and family and your credit cards are likely to be your first investors, you will need to turn to outside funding. Few venture capitalists invest in very early stage companies as these seed deals often are companies still being formed. Many angels will mentor these entrepreneurs before they decide to invest in their company and can assist in the shaping of the new company.
Some angels invest in pre-revenue companies, yet prefer to work with seed fund deals when the product or service has been established. A few banks and venture capital funds specialize in seed and early stage deals, yet these are limited and the firms are very particular about their investment risk exposure.
To fill the gap between seed and early stage funding, some venture capitalists also act as angels when a deal does not fit their institutional fund criteria. It is a way for them to support a deal that they believe will be a success even though the company may be pre-revenue. Some angels also have investments in VC funds. Those typically have a higher starting level in the amount of money they will lend, but are also often more conservative in their lending habits.
How do you determine who is doing what and what amount of money can be invested by the angels?
In all reality, there are no hard facts as to the amount of money that is invested by angels.