Go Army and be a officer once u get out of college if your doing ROTC
(1)You should go alone. your grown. and just ask as many question as possible about everything.the benefits, medical, your pay, your rank going in, ask about your asvab scores, try to get a job that you will enjoy. And one that has a civilan option.
(2)recruiters job is to sell the army or navy to you. they want you to join. it also gives them commission a lil extra money, but they will disqualify you for drug use, or if u are a crazy person on pills. My recruiter didnt lie to me tho.
(3) you have to go thru a process. have to take the asvab, reserve your job that you qualify for, pick a date when they able to send you to meps, you have to fill out a TON of paper work. but all in all its worth it.
(4) it depends on the job and when they have classes avail for your training and BCT. and when you graduate college.
(5)Yes do research on MOS (military occupational Spec) and try to find a job that u will like. but just remember you MUST qualify for that job and if it is avali for you. your rank depends on how many credits you have or if u have a 4 year degree you can go in as a E-4 or qualify for OCS if you done ROTC in which after that you can become a O-1 which is Second LT. (major pay raise) the recruiter will tell you more about that tho.
ME, been there done that. Future army soldier.