Installing on a new PC

Hi everyone..I have a rather basic query here which is causing me some anguish..I am seriously thinking of getting a new PC very soon, however, the thought of re-installing programmes is giving me a headache.I see no problem in accessing Creative Cloud and downloading P/S and L/R onto the new PC but am I correct in thinking that I will lose the add ons that I have accumulated over the years  i.e brushes, pre-sets, actions..Also I have on my current PC CS6 which I keep there just in case.. I still have the original disc and serial number but will this install on the new PC as it is so old, it goes back to when CS6 first came out... Is it worth it I ask myself?   Anyone else going through this?