when i connect my apm to mission planner nd connect it to terminal it shows this , instead of the normal window , seems the cli function is not working and its just giving random letters

Maybe GPS connected to wrong port.

Terminal has been disabled on APM since 3.2. What do you want it for?

for data logs, is there ant other way i can do a data log?

Yes, some features have been integrated into Mission Planner. You can download datalogs and do motor test while connected to Mission Planner.

EDIT:

Use gui "mission planner", under "flight data" have an option to save logs.

okay tats done, how can i do a motor test?

I think that comes under Initial Settings---Optional Hardware---motor test . You can spin each motor at custom throttle percentage.

yeah it works great , thanks!!