Part (2) The Paris Bus system - using the route finder. Another useful site in understanding the Paris bus system is:
In this example (page 1), I entered the location or Metro stop nearest to us (the site doesn't accept all addresses). That would be Bastille. I entered Tour Eiffel as the destination. Since I am interested in bus transportation, I clicked on "bus, tramway" and "shortest walking distance." Next to be entered was a midweek date and the time I wanted to depart. When I click on the "search" box, page 2 appears.
Page 2 indicates what bus to take (# 87), what time to catch it, how many minutes the ride will be, and how many minutes it will take to walk to Tour Eiffel. The final destination bus stop location is shown on the map. It doesn't show up here, but on the website there are small map icons next to the departure and destination (to the right of "duration"). I clicked on the departure destination map icon and got page 3.
Page 3 shows all the bus stops in the Bastille area. By putting the cursor over the circle bus stop symbols, the bus numbers will show up. I wrote in Bus # 87 for illustration. So now I know exactly where to go to catch the # 87 bus to Champ de Mars, as well as where it will stop when it arrives there. There is an option "return" that shows up for displaying the return route information. In Part (3) I will post photos of sample bus stops as well as a video of what happens when you enter a bus.