MBP(Leopard) has ALL music (Amazon, my own CDs,etc) in iTunes. I do NOT want to use in new MBP(Yosemite). Now, iPodTouch64 is now stuck at "plug in to iTunes" screen. Can I plug it in to my old MBP without fear of losing ALL?

Question

My iPod64Touch is frozen at that screen, with no way to get to settings. I have even pressed the top (on/off) button and the button at the bottom (front) at the same time, and it just returns to the frozen screen. Let it drain, recharged, and get the same screen. I'm sure this is Apple's way of forcing me to send all my 6674 items to my new MBP(Yosemite), and know it will not include my Amazon purchases and personal CDs that are on the old MBP.  I don't use videos, photos, or anything other than music on the iPods.
ITunes on the old computer, under Devices>Device backups, shows:
iPodTouch 64 ------------------------------------12/24/14 9:33pm
iPodTouch 64 - Feb 14, 2015 7:07pm ----12/24/14 9:33pm
I use this device in the cars only, and have played it many times until last week, when I got the frozen screen after disconnecting from my husband's car. The CAR couldn't have tried an update, right? I forgot about Sync, didn't I? I've now checked the box to "Prevent iPods, iPhones, and iPads from syncing automatically". Why didn't I see that before now? It's possible that the update was so large, that the iPodTouch wouldn't take it and just quit, without completing the update, but left me this unresponsive screen.
So can I safely just plug the USB from the iPod64 into the older 2008 MBP and update it from there (WITHOUT DANGER OF LOSING ENTIRE COLLECTION)? Make it simple; I'm 74 and not as savvy as I used to be! I tend to zone out with long descriptions, but if you have to....fire away...between hubby and me, we can usually figure it out.
I haven't migrated from older to newer MBP or to iPad4 yet because I wanted to be selective in doing so. I am offloading all my photos, digital art, documents and important Applications onto separate thumb drives, before upgrading the old MBP, and will probably backup the whole thing on a new external backup drive, too. Then, will upgrade to Snow Leopard (the last update the 2008 MBP will take), and use it almost exclusively offline.
I have a 'Classic iPod' that I purposely haven't updated since the last of '14. All purchases from all sources are on there (as on the '08MBP) and I want to keep it that way. We keep it in players and do not plan to update it or play anywhere else, except perhaps with headphones or through the tuner occasionally. I'm assuming it is safe from the same fate?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Devices discussed here (but see ALL devices. I'm a Mac user since 1988, and most devices are still in use! I have not upgraded the PowerMacs or the mini):
2008 MacBookPro: Mac OSX 10.5.8, 2.6 GHz Intel Core 2 Duo; 4GB 667 MHz DDR2 SDRAM; capacity 185.87 GB, Avail: 17.06GB
Retina mid 2012 MBP: OS X Yosemite 10.10.3; 2.6 GHz Intel Core i7; 16GB 1600 MHz DDR3; Intel HD Graphics 4000 1024 MB; 499.05 GB, 440.61 GB free
iPad Retina 2012 56.3 Capacity, 36.2 avail; v 8.3 (60 songs, 2,947 photos)
iPod64, 4th gen (2010-2012)
Classic iPod, 80GB 6th Gen (discontinued) - contains entire collection, including Amazon purchases and personal CDs.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Answer 1

My iPod64Touch is frozen at that screen, with no way to get to settings. I have even pressed the top (on/off) button and the button at the bottom (front) at the same time, and it just returns to the frozen screen. Let it drain, recharged, and get the same screen. I'm sure this is Apple's way of forcing me to send all my 6674 items to my new MBP(Yosemite), and know it will not include my Amazon purchases and personal CDs that are on the old MBP.  I don't use videos, photos, or anything other than music on the iPods.
ITunes on the old computer, under Devices>Device backups, shows:
iPodTouch 64 ------------------------------------12/24/14 9:33pm
iPodTouch 64 - Feb 14, 2015 7:07pm ----12/24/14 9:33pm
I use this device in the cars only, and have played it many times until last week, when I got the frozen screen after disconnecting from my husband's car. The CAR couldn't have tried an update, right? I forgot about Sync, didn't I? I've now checked the box to "Prevent iPods, iPhones, and iPads from syncing automatically". Why didn't I see that before now? It's possible that the update was so large, that the iPodTouch wouldn't take it and just quit, without completing the update, but left me this unresponsive screen.
So can I safely just plug the USB from the iPod64 into the older 2008 MBP and update it from there (WITHOUT DANGER OF LOSING ENTIRE COLLECTION)? Make it simple; I'm 74 and not as savvy as I used to be! I tend to zone out with long descriptions, but if you have to....fire away...between hubby and me, we can usually figure it out.
I haven't migrated from older to newer MBP or to iPad4 yet because I wanted to be selective in doing so. I am offloading all my photos, digital art, documents and important Applications onto separate thumb drives, before upgrading the old MBP, and will probably backup the whole thing on a new external backup drive, too. Then, will upgrade to Snow Leopard (the last update the 2008 MBP will take), and use it almost exclusively offline.
I have a 'Classic iPod' that I purposely haven't updated since the last of '14. All purchases from all sources are on there (as on the '08MBP) and I want to keep it that way. We keep it in players and do not plan to update it or play anywhere else, except perhaps with headphones or through the tuner occasionally. I'm assuming it is safe from the same fate?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Devices discussed here (but see ALL devices. I'm a Mac user since 1988, and most devices are still in use! I have not upgraded the PowerMacs or the mini):
2008 MacBookPro: Mac OSX 10.5.8, 2.6 GHz Intel Core 2 Duo; 4GB 667 MHz DDR2 SDRAM; capacity 185.87 GB, Avail: 17.06GB
Retina mid 2012 MBP: OS X Yosemite 10.10.3; 2.6 GHz Intel Core i7; 16GB 1600 MHz DDR3; Intel HD Graphics 4000 1024 MB; 499.05 GB, 440.61 GB free
iPad Retina 2012 56.3 Capacity, 36.2 avail; v 8.3 (60 songs, 2,947 photos)
iPod64, 4th gen (2010-2012)
Classic iPod, 80GB 6th Gen (discontinued) - contains entire collection, including Amazon purchases and personal CDs.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~