Age range? - any persons 18+ can benefit from & participate in Pilates exercise.
I'm injured, can I exercise? - yes, there are a plethora of movement options to stretch & strengthen.
I have (low back injury, arthritis, pregnant, etc.) - modifications are available for almost anything!
Do I need equipment? - yes & no. Just a mat is enough & you can scale up from there if you wish.
Do I need experience? - no, anyone can learn Pilates & if you have experience, you can advance!
Is it mat or reformer? - whatever equipment you have is the type of session we can hold.
If all you have at home is a mat, the one prop I highly recommend is an extra long (36") foam roller
If you have a reformer at home, you can accelerate muscle strength, joint mobility & overall flexibility