I've done the audi TSB for updating the clutch pack from a 6 plate to a 7 plate pack. Its hard to explain the tools you need without seeing a picture of them. You can make due without them but its best to have them. I would highly recommend buying a bentley manual which will have step by step instruction of tear down which you need, the dealer can also sell you the tools to do the job, but they may need to be ordered. If you want to buy the tools for the job but don't have the part numbers, ask them too look up the TSB at the parts counter and it will have the related tools listed. Basically snap ring pliers, pullers, punches etc.
Edit: found the TSB related to your repair, the parts/tools are listed towards the bottom. Read the entire TSB.