Yes, the jailbreak will be lost. When you upgrade your iPod Touch software, it is completely reinstalling the software used to run it. When you jailbreak an iPod Touch, you are only jailbreaking the software, not the actual iPod.
No, you cannot upgrade the software on your iPod touch using a PS3. You need a computer.
Plug in white chord and itunes shows up. Go to my ipod and you will have a choice to upgrade it.
Yes, all iPhone and iPod Touch models use the same operating system, meaning the same software updates.
The software updates for the iPod Touch are free (See links below).
iPod software is updated by plugging the iPod into the computer and using Apple iTunes software to upgrade.
you have to upgrade the iOS to 2.2 or above
This means you have to update your software on your iPod Touch. You have too old of a software to run the apps (you are possibly running the 1.0 software). Upgrade to at least the highest upgrade of 2.0 software.
Yes, you can upgrade without buying a new iPod Touch. You must go to iTunes and search for the 3.1 software. Then, you can just buy it and download and install it.
You cannot upgrade the RAM on your iPod Touch. The RAM on your iPod Touch is permanent, and if you want it faster, you must buy the newest generation of the iPod Touch.
No, you have to restore it, then download the new software, update it, then jailbreak it again. It sucks, i know, but there isn't much you can do.
You cannot upgrade an iPod Touch's flash drive to a larger capacity. The flash drive is what it is on an iPod Touch. You cannot change it, increase or decrease it.