G'day mate,
With a 200mm scope, you'll be able to see lots of detail, depending on your "seeing" (atmospheric conditions). You won't see rocks on Mars, though, but neither would a 20" scope.
Have a look in the "Solar System" section, under "Images" to see some of the photos forum members have posted to get an idea.
I don't think english is your native language, so slow things down for a minute, andd do your best to answer all of these questions.
1) Where do you live? You said you are in Perth "temporarilly". If so, how long for? And where are you going after?
2) What eye pieces did you get with your telescope? If you look at your eye pieces, there might be some sort of number there. Ex. 25mm. In general, the higher the number on the eye piece, the less magnification, and the wider the view. A 9mm eye piece will give you a more MAGNIFIED view than a 25mm.
3) If you wanted to computerise your scope, I'd suggest an EQ-6 GO-TO, which you can pick up for around $2000, however I wouldn't recommend this for you just yet until you answer the above questions, and get used to your scope.