Yes, you can upgrade from 32-bit Windows 7 to 64-bit Windows 10.
Yes, you can upgrade from 32-bit Windows 7 to 64-bit Windows 10.
You're not sure about the CPU type, are you? It's possible you need to perform a fresh installation. Do you know if your system is 64-bit?
It's a sandy bridge i5, yet the operating system runs Windows 7 32-bit.
The small upgrade appearing in your taskbar won’t be accessible from there. You’ll need to wait for Microsoft (or another party) to release the 64-bit Windows 10 ISO, save it to a flash drive, and install it on your PC using a code obtained via any code extractor tool.
Yes, you should install it on your computer during the upgrade.