Should I buy a new or used trombone?
It depends, in my opinion, on you level and your dedication. If you are just starting out and are buying your first trombone I'd suggest buying a new trombone.
If you have played a couple of years and know how everything is supposed to work you can find a good deal on a used instrument on places like eBay or Craigslist.
Should I rent or buy a trombone?
If you are just starting out and are not sure you'll continue playing it might make sense to rent. If you have just a small amount of dedication to trombone playing I'll strongly suggest buying a horn.
There are cheap horn available that you'll be able to sell at a not-so-great loss.
Where do I find a trombone teacher?
If there is a (professional) trombone player in your city, call him/her and ask for lessons. No matter how you spin it 1 on 1 lessons in person, is the best option.
If that is not possible for you, there are online music schools where you'll be able to find a teacher.
Should I buy a student trombone or a professional trombone?
There are benefits to both student and professional trombones.
Student models are generally easier to play while professional horns offer more depth of sound and are of a much higher overall quality.
If you are just starting out go with a student model.
How much does a trombone cost?
Prices range from around $80 to $10.000.
Trombones are quite simple to produce compared to other instruments and are comparably cheaper.
Just know that you get what you pay for. Don't buy a $80 trombone and expect to sound like a professional.
What other equipment other than the trombone do I need?
Well, a case or a gig bag are nice to have if you plan on playing with others (and you most definitely should do that).
A music stand is also nice.
Are trombone players good kissers?
You don't have to.
I have played trombone professionally for 20+ years but opinions expressed on this page are just that: my opinion.