To set up a Points Per Dollar Spent program go to Settings > Credit & Gift Cards and click on the Gift Cards tab.

Select Dollars Spent in the Award Points Based on field and then assign a point value to dollars in the Points Per Dollars Spent field.

To assign point values to products go to the product and enter "Edit Mode".  Click on the Loyalty Settings button and put a number in the "Loyalty Points for Redemption" field.