For your purposes, "a Paradox file is just another format for a database table."
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Depending on the tool you're using, you might find that you already have an ODBC driver that will understand this file-format. It's fairly unlikely that you'll need to have Paradox itself or to know too much about it. If a driver's available, you can "import" data from the table and (say in MS-Access) you can also "attach" it.
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It is VERY important to be aware that ALL of the files with a particular filename, in the same directory, TAKEN TOGETHER, constitute "a table." For example, a Customer table might consist of: CUSTOMER.DB, CUSTOMER.PX, CUSTOMER.XG5, CUSTOMER.FAM... All of these files, taken together, must be together.
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If Paradox IS available, also bear in mind that it can be used to "export" the data into some other format that might be more convenient for you, e.g. dBase. Depends on what you're doing.