Can I restore water to a house after it has been winterized? Or is this definitely a job for a plumber?

Annie
by Annie
The house was a foreclosure and probably had been winterized 6-8 mos ago. One toilet's turn on valve/handle seemed rusted or ? Couldn't turn it. House is 14 years old and in GA. Pipes very unlikely could have frozen. We had a very mild winter Thanks!!
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