I agree with most of what cjdelphi said, with a few exceptions.
1a is probably a 250V mylar capacitor.
1b may be a MOV (overvoltage protection device commonly used in surge protectors) or a ceramic capacitor.
1c looks like a ceramic capacitor. It looks to thin to be a MOV. Is it labeled something like 0.1u or 0.01u or 0.047u or 47n?
2 and 3 do indeed look like inductors, ferrite core. If you cut away the heatshrink, you should see a dumbell made of a black brittle substance with enameled wire wrapped around it.
4a is a capacitor. That style is often used as AC line bypass.
4b and c do indeed look like relays. 4b, 24V is the relay coil voltage. The current and voltage ratings are the contact maximum ratings.
5 is a 2W 2.7 ohm resistor. It is common to put an R in place of a decimal point, because it is easy to miss a little black spot on a part like that.
Hard to tell because of the angle, but I think 6 is just a ferrite bead with a wire through it. If that orange stuff is just glue holding the wire in. If the wire is a part of the black shape and there is a white ring around one end, it is probably a diode.
7 might be more capacitors. Or if that is a metal cylinder with the leads bent around in a U with heat shrink over it and a black band on one end, they might be diodes.
Can you get a clear picture, right from overhead?