Start by going to the York website, yorkmodern.com as they have pricing for the base rake and all of your extra attachments. The only thing in your package that you are missing optionwise is the hydraulic ram for angle adjustment. The rake comes stock with an angle adjustment pin and bar setup. A photo of the one you are looking at would be very helpful for us to determine a price. Tines for example are around fifteen bucks a pop-that's about $540.00 for a 6' rake set.
I hope you got the model number as they do make several rakes based on weight, the smallest is towable behind an ATV. The metal model# and serial# placard on mine is attached on the inboard side of the 3-point hitch vertical plate. I bought a lightly used (the guide wheels still have the rubber injection whiskers on the face of the tread) 8' model RI and paid less than 1/3 of a new one. The nice thing about these rakes is that you can add any or all of the options as needed.