Auto finance is what I do for a living and at most large dealers the numbers work out to be around 90% financed and 10% paid in cash.
The dealer that I work at now is a little different since we are out in the country, we average around 75% financed and 25% paid in cash.
As far as the second part of your question, who says that there are more foreclosures then repossessions?
From what I see every month ther are more repossessions then foreclosures.