How do you sync iTouch to iTunes if you don't own or have access to a computer?

Question

For some time now, my iTouch 4 iOS 4.3.2 (or whatever the latest iOS Apple still provided for this particular device), 59.1 GB, with wi-fi, no cellular, has displayed a screen message indicating there is no room to complete download of song(s) or to complete one or more App updates because "storage" is full. Most of the time, downloads and updates run fine. I know the iTouch capacity is practically full, so I've deleted Apps, large photo files, etc. etc. to free up space on it, then all goes fine until the next time that message appears following updating Apps or whatever. But there is plenty of "storage" still available with my iCloud subscription, so I've been ignoring these messages, assuming the message had more to do with the iTouch's dwindling free space and not lack of iCloud space. But, for the first time last night while listening to music stored on the iTouch by docking it to a Bose Wave radio (btw, something I've done without problems for a long time) the iTouch stopped playing on it's own while in the dock, first displaying a black or blank screen as if it was turned off but then displayed a screen image (new to me) of the end of USB cable that would plug into a PC port with an arrow pointing to the iTunes icon. No matter what I've tried, this image returns then stays on at least while the iTouch is docked. I have been doing daily backups to iCloud for this and my newest version of the iPad. My computer died several months ago, so until I buy a new one, I've not had any means to do a PC iTunes sync or PC iTunes backup for the iTouch. My last iTouch back-up was in April and I believe I checked the iTunes boxes to sync/back-up to iCloud rather than to the PC, if memory serves me right.  Up until now, not having iTunes on a home PC hasn't been a problem, so I never gave thought that Apple would require one to have a PC or MAC if one wanted to own and maintain an iTouch, iPhone, iPad, whatever. I realize the iTouch is getting old, but has been working fine up until now. Does anyone have any ideas other than buying a new PC or MAC to install iTunes on?

Answer 1

This:
but then displayed a screen image (new to me) of the end of USB cable that would plug into a PC port with an arrow pointing to the iTunes icon.
Means the iPod encountered and error and you have to connect the iPod to a computer with iTunes and an internet connection and restore via iTunes.
For how to restore:
iTunes: Restoring iOS software
To restore from backup see:
iOS: How to back up     
If you restore from iCloud backup the apps will be automatically downloaded. If you restore from iTunes backup the apps and music have to be in the iTunes library since synced media like apps and music are not included in the backup of the iOS device that iTunes makes.
You can redownload most iTunes purchases by:
Downloading past purchases from the App Store, iBookstore, and iTunes Store        
Also say you have iCloud but that requires iOS 5 or later except with your iOS verions (4.3.2) you can redownload iTunes purchases on the iPod.
Downloading past purchases from the App Store, iBookstore, and iTunes Store