Once you have removed swirls, you will have to maintain the finish by washing using a car shampoo using proper wash mitts and microfiber clothes. Its also harmful to remove swirls with an abrasive every now and then..
Anyways- if i were you i would buy
1) Meguiars ultimate compound
2) Dodo lime prime polish or Meguiars ultimate polish
3) Dodo juice purple haze wax or meguiars gold class wax
4) Wash mitts, mf towels, applicator pads,etc.
Use ultimate compound only once a year. Ultimate polish every 2.5 months and wash amd wax weekly.
For the interior-
Buy either zymol leather cleaner and zymol leather conditioner.( if you have leather seats)
For the dashboard- meguiars quik interior detailer or turtle ice interior spray.