1 and 2: with substantial college attendance after high school graduation, just about all colleges will require you to be a transfer student (military service academies may be exceptions).
3. It will hurt if you fail all of your classes this semester.
4. It can be, but not necessarily. What can make it hard is if the reasons for leaving college prevent you from returning to college and do not go away (e.g. not having the money, or poor academic performance).
5. If you can withdraw without a bunch of F or WF or similar grades on your record, that will be better than having a semester of poor grades.
6. Most students attending community colleges choose those close to home or work for convenience commuting to them. Where there is a choice, those which have courses that match those at target 4-year schools may be more desirable.
With 59 credits and a 3.78 GPA (if you can withdraw from your current college without a bunch of F or similar grades), then you may not need to take too many semesters at a community college before transferring to another 4-year school. Many 4-year schools take transfers only up to the junior level, so substantially more than 60 credits of community college or other lower level courses may not get you closer to BA/BS graduation. But that may be necessary if you want to change your major to something that requires many prerequisites that you have not taken already.