Lots of questions there! I can't speak of the 1100, but removing the rear tire on a 650 is pretty simple. There are 4 bolts on the the left (clutch) side of the bike to remove and on the right (brake) side there is 1 bolt for the equalizer bar and also the brake cable itself. Remove the axle bolt and it will come right out. Of course, be sure the bike is lifted and secured 1st! The driveshaft will come along with it. That is the hardest part to get back together, and an extra set of hands is very helpful!
If you have spoked rims, you have to run a tube. Cast wheels can be either tubed or tubeless. Do some research and buy the tire you feel fits your needs.
As for getting the tire mounted, your best bet is a cycle shop. I have found that around where I live, it costs more to have the tire mounted if you didn't buy it from the shop doing the install. After a few phone calls, I found it to be the best deal to just take the bike to the shop and let them remove it from the bike and put it back on. (40 bucks labor at my Yamaha dealer). They gave me a break on the tire then, too.
One last note: make sure, ABSOLUTELY SURE!!, that the final drive splined get lubed when the tire is off!!! This will save you many dollars!!! It sucks big-time when those splines strip and your ride gets cut short.