Minimum investment will be based on which contract you want to trade? or how many lots you want to trade in MCX ,? either intraday or positional.
you can check the span margin calculator from the below link and can find out the span margin required
https://zerodha.com/margin-calculator/SPAN/
for varsity chapters http://zerodha.com/varsity/module/futures-trading/
you can also check the expert advisor page for the trading stratagies and code