1_Fat will redistribute. Now it probably is arranged in a male looking way, but after a few months on hormones part of it will move to your hips, thighs, breasts... The more fat you have, the more of it will move towards those areas. Hormones will make you look fatter, so you'll have to balance your weight and appearance according to what you want.
2_ Yes. You'll get "fatter" and your muscles will become softer, this applies to you whole body, including your face, which will become rounder and get softer features.
3_ Yes. The higher levels of oestrogen will make you more emotional, like most women. This might involve laying whole days in bed crying for stupid things like your mother killing al fly, and easily getting angry at someone for the same reasons. In other words, you'll be emotionally on your period the whole month until you get used to it.
A lot of trans people tell they started feeling better just because of taking hormones, as if your brain liked the new proportion of hormones.
4_ No. Changes take time to start and stop. Hormone levels in your blood don't change in a matter of hours, and it takes even more time for them to start affecting your body. Changes begin at least two months after starting HRT, so expect a similar time for them to stop.
Depending on how much time you've been taking hormones, some aspects are reversible, but again, they take time.
