motor specs are 6v,300mAYou didn't provide the specs on the motor (as far as current requirements) so we OBVIOUSLY can't answer question #1
You can't "magically" increase current if its not there in the first place.
Ohms law...
6V x .15A = .9 Watts (so you have .9 watts to work with)
If current goes up..voltage goes down.
sir i am unable to understand your answer. also what are the specs of your motor?A motor with flea power can move a very heavy load. If its GEARS or pulleys allow the load to move slowly then the torque is increased.
I have a couple of RC helicopters. The tiny motor spins very fast near maximum speed for near maximum power and the gears drive the blades slower but with higher torque.
It can lift itself easily including the radio receiver, gyros, servos and battery.