The Recommended Timeframe depends on your settings, but you can use M5, M15, H1 and all others timeframes with the appropriate settings.
The Expert can go on EURUSD, GBPUSD, AUDCAD and AUDCHF, but also in others with the appropriate settings.
This EA is called XAU Miner V3. This EA uses a grid and martingale system. Maybe some people are not compatible with this system. For that you need to make observations whether this is suitable for you or not.