You can but make sure you itemize all your items that are bought. ie.. staples=office supplies / milk=owners draw. and so on. You would have a hard time separating everything in case you were audited.
      Answer1:You can if your business is a sole propieter.Even though, you want to keep your business and personal finances seperate. This will help you during tax time to figure if you made or loss money, and enter it properly on your tax return.My-Lan Web Designhttp://webdesign.my-lan.us/
      Answer2:You shouldnt. Every aspect of the business should be accounted for and if you use your personal account, you can make things very complicated. It will be much harder to keep the accounts separate.