Hi Justin and welcome to the forum.
cinematic footage usually means :
- shallow depth of field. That´s what the aperture does along with a larger camera sensor (APS-C sized or "full frame")- so google "aperture shallow depth"
- low contrast
- and of course great lighting, composition,....
Many people will say buy a dedicated videocamera, but the ones in your pricerange won´t give you cinematic footage. You rather want a DSLR or a mirrorless camera. My suggestion would be the sony mirrorless system. I film quite a few weddings and I currently only use sony mirrorless cameras for that cinematic look. Look at the sony a6300, if that is too expensive, the a6000 is a good starter.
In regard to lenses - the "mm" tell you about the focal length of a lens. Take a look at this page:
Sigma Imaging UK | Focal Length Simulator The red square shows the angle of view of an APS-C sensor (see point one above). Usually you´d get an APS-C camera because they are more affordable than full frame.
In regard to tripod: if you plan to use it for panning, or tracking people, etc. you want a really great fluid head, everything else will hardly work. Take a look at Sachtler - for example
this one on b&h. They are expensive, but trust me you get what you pay for. If you don´t want to move your camera, you can look at much cheaper tripods.
In regard to mic: that depends a lot on what you are going to film. Every mic has a different recording pattern. That´s somewhat similar to focal length. Some record the audio all around, others focus more on several areas. For film you´d usually work with a shotgun mic, or a lavalier mic (with a recorder or transmitter) right on your talent. Rode mics has a good affordable lineup of mics.
In general: before you buy equipment, watch a lot of youtube videos and read the description of those to see with which equipment they were shot, for example this one for the Sony a6300 with the kit lens:
And then there is a nice video of Brandon Li that gives quite a few answers to your questions and the ones that may rise in the next few days for you

Particularely the part starting at 4:22 is a MUST SEE for everyone doing video!!!