I've got the 2001 park'ed Champion:
Q1:
-Make sure it's unloaded.
-Drop the mag, pull the slide back to where you can remove the slide stop.
-Move the slide forward toward the muzzle making sure to wrap your fingers underneath in order to hold the recoil assembly in place and remove the slide.
-CAREFULLY remove the recoil spring, GR, & plug (my spring feels like a 35 pounder so I ALWAYS wear eye protection).
-Flip the barrel link down against the barrel and slide the barrel out the muzzle end of the slide.
- Reassembly is just the same thing in reverse order ( Making sure to keep your fingers wrapped tight around the recoil system as you replace the slide).
Q2:
I'm not sure if a FLGR is available for the Champion but I believe Wilson offers one listed to fit the Springfield "Compact." Personally I haven't felt the need for one.
Q3:
I prefer CMC Shooting Stars, but your particular gun might work better with Wilsons, Metalform, or GI surplus. Honestly, it's trial and error here.
Q4:
I always lube a new gun before it's first range trip. The field stripping involved lets me see potential problems and gives me some piece of mind as well. Any time I shoot my guns they get cleaned and lubed as soon afterward as possible. If they've sat unused for a long period (6 months or so) I "try" to field strip them and do a quick cleaning just for the Hell of it... maybe just boredom on my part though.
By all means, call SA and get an owners manual. I don't have the phone number handy but I'm sure it's listed on their website under a "contacts" area somewhere.
If you have any experience at all with the 1911 design you'll be fine. Other than the bull barrel and lack of a bushing on the new models they're pretty much like the full size guns.
Good luck with the Champion, it's a great shooter!
Mac