Hi Stacey,
In terms of the double entry, it's mostly hidden from the user as most of the users are not accountants. However, as you have found out once you start entering journals, as opposed to sales, receipts, purchases and payments, it best to know something about this.
In Free Accounting Software Journals debits are entered as positive figures and credits are entered as negative figures. The normal sign for revenue (and liabilities and equity) is a credit so you should enter it as a negative figure. In your example this would apply to "other revenue" and "interest earned".
Also the journals you have outlined can all be done as one journal. So the journal is:
-$??.00 Post to “other revenue”
-$??.00 Post to “Interest earned”
+$??.00 Post to “other expenses”
+$??.00 Post to “other motor vehicle expenses”
+$??.00 Post to “printing and stationery”
+$??.00 Post to “advertising and promotion”
+$??.00 Post to “Cash on hand”
You may also need other accounts such as:
-$??.00 "Loan from owner"
-$??.00 "Sole trader equity"
The balance of "Cash on hand" would then be equal to the business's cash at bank balance on 30/06/2011. You then process a receipt and use account "Cash on hand" and then the balance of cash on hand will be zero.
After you enter the journal you can view it in the balance sheet and profit and loss. If it is not correct you can just click "edit" and change it.