1. when we talk about frequency, does the waveform make a difference. i.e. will filters and frequency dependent resistors (using capacitors/inductors) work for all waveforms (pulses included).
Your question is quite broad so we may need to break it down to smaller questions. The waveform and the frequency are very closely interlinked. As the waveform repeats, so the frequency is set. But if the waveform that is repeated is a rectangle or a triangle or some weird wobbly thing the frequency remains the same as long as the waveform repeats in the same period.
The most basic waveform for our purposes is the sine wave. This is exactly the waveform that you get if you were to view a single point on a rotating circle by viewing the circle on edge. It is also the waveform you get when a person dangles on a long and lossless bungee cord. I mean to say that it is the most basic waveform. Other waveforms, including square waves, triangle waves and all others can be broken down into a sum of many sine waves, believe it or not. It is typical for any waveform to be constructed of a sine wave at the repeating frequency of the waveform plus a sine wave at double that frequency, plus a sinewave at triple that frequency and so on. The amplitudes of these "harmonic" sinewaves determine what the shape of our waveform is.
Since any weird or arbitrary waveform other than a sine wave can be said to be the sum of many sine waves at "fundamental and harmonic frequencies" the effect of a frequency dependent reactance, like that from an inductor, will vary depending on the amplitudes of those harmonics. So components like inductors for example, or filters for that matter, will have different degrees of effect on waveforms of different shapes.
2. Assume i have an emmiter follower with an output of 0.7v as a result of having to bias the transistor. If i have a tiny input signal that gets amplified to 1mv, do i see now see an output of 0.71v?
The bias of a transistor is a DC thing. That 0.7 volts is the DC voltage at the emitter. When you put a signal through of, say, 1 mV, (which I assume is 1mV RMS AC, which is 2.8mV peak to peak AC), then on the emitter you should see a 2.8mV peak to peak AC swing centered at 0.7 volts. In other words, the voltage should swing (its an AC signal) from 0.6986 Volts to 0.7014 volts.