Dude! what kind of telescope?
I have gotten one for my kids and they seem to enjoy it
I dont think I could see mars THAT clearly with it though
Even an 8” (diameter) cassegrain scope will show the ice caps under good conditions (clear skies, near perihelion opposition, etc). If you want to see really nice detail then you need a 14”, but something in between would work pretty well. You can google images using keywords like amateur telescope mars (or jupiter, saturn, etc) to get some idea of what a scope can show. Most people say what size scope they used when doing photography. Bear in mind that you are usually seeing ideal pictures and not what is typical. Observing with a telescope takes a lot of patience and luck getting good viewing conditions.