Your drive. Get a new one, like today, get your info off that old drive and replace it.

I hope Salem, MA never changes

The chokepoint here would be the networking and RAM. Pi-hole isnt all that resource intensive but does use a bit of the network resources. Kodi, should run along with it but the performace as stated from other posters will leave a lot to be desired. The 2GB of RAM is not going to be powerful enough to do a lot. On the fly encoding for video is going to suffer by RAM, CPU and network output. Its possible to do it but youll definitely have to be patient with it.