I would recommend Melissa Neill and Petra Genco both are on YouTube and across other social media. Both older post menopausal women with great advice for the appropriate exercise for our age and stage.
Unless you really want to run it isn't necessary as walking a couple of miles a day, especially at a good pace is excellent cardio and is less stress on the bones and joints than running.
As already mentioned strength training is essential for women, especially as we age. 2 or 3 times a week will help you get stronger and improve posture. It also will shape your body if you are consistent. Its extremely hard for women to build large muscle so you don't have to worry about bulking up, it will just help your strength, stamina and balance keeping you youthful as you age. Building up your bum muscles, as well as giving you an attractive derriere helps with back pain as these muscles are essential for holding up the spine (along with the core and stomach muscles). Weak muscles and slumping posture can create issues with pain.
Flexibility is also very important so pilates, yoga, dancing etc can all keep you flexible.
I would definitely get advice from a personal trainer before you start weight training as its possible to injure yourself or lift incorrectly.
I have completely transformed by body through weight training over the years, even when I was too busy to do much cardio so I highly recommend it.
What we think of as "typical" aging when people slow down and have problems with mobility and doing simple things such as standing up from a chair are almost all due to lack of exercise and weight training.