Total debt for Toyota (symbol TM): $136.8 Billion
Market Capitalization for TM: $104.05 Billion
Total debt for Ford (symbol F): $156.79 Billion
Market Capitalization for F: $5.88 Billion
These numbers are current as of 1/3/09 from Yahoo! Finance.
Divide the debt by the market cap, and you have its debt-to-equity ratio.
Hope this helps.