I'll tackle these one by one:
1. I'm assuming your original disks no longer work. It's usually best to reinstall from those, but if you need to make a backup from what's already installed, it will work in most cases--but keep the following in mind:
--Most older programs (pre-System 7 era) have all their files stored in one folder. This is pretty easy to back up.
--Some newer programs, specifically those from Claris and Microsoft, keep data files in the System Folder.
--Back up all your fonts, since some programs will install fonts.
--There are a few programs which only permitted one hard drive install from the master disk. If it no longer works, you're out of luck. Fortunately, I've only seen two cases of this (FastBreak by Accolade and Dietary Analysis by Orange Juice Systems--yes, that's the name of the company).
What programs in particular are you dealing with?
2. Your best bet is to pick up a cheap OS 9 machine and make the floppies from there. Look for a beige G3 (which can handle both 800K and 1.4MB disks) or an iMac G3 (which can be had rather cheap right now) with a USB floppy drive (also dirt cheap if you know where to look). The USB floppy drives can only handle 1.4MB disks, but since you have a Classic, it's not a big deal, and even if you do get an 800K drive machine up and running, you can always convert between the formats on the Classic. There are indeed a few ways to do it from a Windows PC, but honestly, by the time you get it done, you'll have wished you had just bought an old iMac--which also gives you a fun classic you can run on the internet using the excellent Classilla browser. (It's a little bit limited and you'll have to use mobile versions of some sites, but it's nonetheless a good experience).
3. Classic IIs are notorious for logic board failures due to bad caps. You'll want to get the logic board (the main board) recapped (contact Uniserver on here; he's recapped several of my boards and has always done a professional job). The Classic Is will need it too, it's just that they tend to last a little longer than their II counterparts (at least in my experience). Eventually, you'll want the analog board recapped, too. (This is the vertical board which contains the power supply).
1. I'm assuming your original disks no longer work. It's usually best to reinstall from those, but if you need to make a backup from what's already installed, it will work in most cases--but keep the following in mind:
--Most older programs (pre-System 7 era) have all their files stored in one folder. This is pretty easy to back up.
--Some newer programs, specifically those from Claris and Microsoft, keep data files in the System Folder.
--Back up all your fonts, since some programs will install fonts.
--There are a few programs which only permitted one hard drive install from the master disk. If it no longer works, you're out of luck. Fortunately, I've only seen two cases of this (FastBreak by Accolade and Dietary Analysis by Orange Juice Systems--yes, that's the name of the company).
What programs in particular are you dealing with?
2. Your best bet is to pick up a cheap OS 9 machine and make the floppies from there. Look for a beige G3 (which can handle both 800K and 1.4MB disks) or an iMac G3 (which can be had rather cheap right now) with a USB floppy drive (also dirt cheap if you know where to look). The USB floppy drives can only handle 1.4MB disks, but since you have a Classic, it's not a big deal, and even if you do get an 800K drive machine up and running, you can always convert between the formats on the Classic. There are indeed a few ways to do it from a Windows PC, but honestly, by the time you get it done, you'll have wished you had just bought an old iMac--which also gives you a fun classic you can run on the internet using the excellent Classilla browser. (It's a little bit limited and you'll have to use mobile versions of some sites, but it's nonetheless a good experience).
3. Classic IIs are notorious for logic board failures due to bad caps. You'll want to get the logic board (the main board) recapped (contact Uniserver on here; he's recapped several of my boards and has always done a professional job). The Classic Is will need it too, it's just that they tend to last a little longer than their II counterparts (at least in my experience). Eventually, you'll want the analog board recapped, too. (This is the vertical board which contains the power supply).