Very much so.
It is a guitar amp based on the Marshall Plexi, one of the first amps made by Marshall.
I like Marshall amps but there pretty expensive so it depends on your price range.
100 watts should be good for small to medium rooms. Of course, it also depends on how "hot" your guitar pickups are.
The Behringer GMX210 True Analog Modeling 60W Guitar Amp ia a good starter amp.
Depends if you have a good guitar or not, if not get a guitar if you do get an amp and just buy a new guitar when your current one is not worth having anymore :)
Paramore uses Marshall amplifiers. You might want to start from the amp and guitar selection than pedals.
Absolutely. A guitar amp is designed to amplify the guitar and related frequencies and as a consequence, sounds nice with guitar. Vocals through a guitar amp sounds bad most the time, as does guitar straight into PA speakers.
I assume you mean guitar amp. The Fender "Blues Junior" is a small amp that gets consistently good reviews.
No, a guitar amp is designed to amplify the signal from a guitar, not a microphone. Using a microphone with a guitar amp can damage both the microphone and the amp.
Just the distortion from a Marshall JCM 900 amp (they don't use distortion pedals).
This is a matter of personal preference, but I would say the best choice would be to go for a better amp. The sound produced depends on both the guitar and the amp, (and most of the guitar's tone comes from the type of strings) but the amp usually caries variable options to alter the sound. A great guitar will still sound terrible with a poor amp, but a poor guitar can be made to sound awesome when hooked up to a good amp with a variety of settings. Many high quality amps come with built in effects in addition to their excellent sound control, and are worth spending that extra bit of money on. For examples of well known and reliable amps, try Marshall, Vox and Peavey.
You know when you have a good guitar amp when it still sounds good cutting through the mix playing live. Many of the solid state amps sound ok on their own, but few can cut it live. Play it loud, in a band, and if it sounds good and distinct in the mix, you have a good amp.