Within the first image, that's a Vixen 100mm f/8 Newtonian(reflector). That one is configured for medium-to-high powers; for the Moon, the planets and double-stars; deep-sky objects, too.
Within the second image, that's a Vixen 120mm f/6.6 fast-achromat(refractor), and configured for low-power, wide-field observations; like a pair of binoculars, but a monocular in this instance. There's a correcting lens-assembly inside, if I'm not mistaken, in front of the focusser at the back of the telescope; like a "Petzval". I know someone within this site who's awfully fond of those types of refractors. If you want to try it out, I'd suggest placing it on the mount within the first image. The telescope might be able to make use of 1.25" eyepieces, in which case I would suggest a 32mm Plossl, to start out, and for all three telescopes.
Within the third and last image, and according to your specs, that would seem to be a Unitron 90mm f12 achromat(refractor), and configured for the medium-to-high powers as well, like the reflector. But that one uses the smaller, .965" eyepieces which are more difficult to source.
For both refractors, a star-diagonal may be required.