you can if you have a few 5 gallon baskets handy to cart it out to the car.
garden hose works best tho. maybe off the kitchen sink? they sell faucet adapters that a hose will fit on.
easy way is to pull the t stat out, put the housing back on, then take the upper hose off the rad, this way the engine pumps the coolant out, while you keep it full in the rad with a hose. run the engine till clear water comes out the upper hose.
once its clear clean water, turn the hose off, run the car till no more water comes out, then put the t stat back in, and add one gallon of straight antifreeze, not that 50/50 pre mixed crap. one gallon, 14 bucks. dump it in the rad, the whole thing, then top it off and bleed the air out the t stat housing.