My dashboard indicators are all malfunctioning. brake,speedometer all on & off

What is your question?

speedometer works sporadically(mostly stays on "0") battery function goes up & down from high to low brake light and brake systems lights are on when brake is off symbols under the brake light are on IMA indicator is on battery light goes on & off This started two days ago on start-up car runs well, but is a little slow to accelerate at first. I bought this car in March with 37000 miles on it. Oil has been changed once. Oil light is always on. Thanks for any help.