Which winter tires will fit my car?

I currently have p185/65r14 summer tires on my car, do i just buy any tire with these dimensions or do i need a specific one with bolts that will fit my car (2001 Ford Focus)? And if anyone is selling them let me know.

The best idea is to buy "take-offs", ie a second set of rims and tires. You could buy steel rims with pie pan wheel covers, but those cost as much as alloy rims.
Try tirerack, they sell take off packages with the tires mounted and balanced.

You're referring to 2 different things.

The tire size ( 185/65R14 ) is the same regardless of which manufacturer you buy the tires from.
The 14" rims are different. For rims you will need to know the bolt pattern and the rim offset. Not all 14" inch rims are the same and not all will fit.

You have two options for installing winter tires. You can swap the tires on the existing rims or you can buy a wheel and tire set. The tire only option is less expensive initially but you have to spend more money each spring and fall to swap the tires on the same rims. It also can stretch the sidewall of the tires after a period of time ( maybe 2 or 3 years ) which means handling will be affected. A rim and tire combo costs more but saves you time and money down the road because it takes less time to switch over each season.