I don't quite understand your problem.
But here's what I have to say.
Your paypal account has a balance of 0. This is normal because you haven't done any transaction yet. Your limit in Paypal is your limit given by the bank. For e.g. bank limit is Rs10,000, Paypal also will be Rs10,000. You have to pay your bank at the end of each month. But this won't appear anywhere on your paypal account.
Payments are automatically converted to other currency. There is no website in the world apart from Shirts.mu that accepts Mauritian Rupees. Besides, you cannot convert money online!