is it a good ESC?? can i run lipo with it?? or can i run brushless motor with it? Thanks in advace.

It is a very good esc. You will be able to run Li-Po batteries but just be aware that there is no LVC (Low Voltage Cutoff) so you will have to monitor your battery carefully. As soon as you feel the car start to slow down you have to stop driving immediately to prevent damage to the Li-Po. Also it is a brushed only esc, no brushless.

Thanks, actually someone owns me money, couldn't pay me back and gave this esc to me... for the value of 20 bucks...........

Not bad for $20. You could probably turn it around and sell it for at least $60 if it is in good shape.