The tester does not start with a balance - that would not make any sense, as the performance test should obviously not depend on some arbitrary start balance. The performance figures are described here:

http://zorro-trader.com/manual/en/performance.htm

For a micro lot account, either contact FXCM and ask them to convert your current real account to micro lots, or open a new account on http://www.forexmicrolot.com/.

Micro lot accounts are recommended - you can trade with smaller capital and get slightly higher profits, as the smaller lot size allows more precise money management.