Depending on your location and whether you take the vehicle to a dealership or independent shop, this repair could range from ~$85 to several hundred dollars. You may want to attempt cleaning the assembly using isopropyl alcohol or DeoxIT-D5 since dust and hair can often interfere with operation. You will need a Torx toolset to remove the assembly.
Usually a replacement cruise control unit can be around 200 dollars. But if you only need a few of the parts it will still come to at least 100 but usually the whole unit comes assembled.
Depending on the year, the cost can range anywhere from $35. 00 and up. It also depends if you do the work yourself or pay to have a shop do it. Also, the dealer is a lot more expensive. Check loacl first, it's the cheapest.