Break the learning process into small steps.
- Write a short program to take data from your keypad, store the values in a variable and display the result on the Arduino Serial Monitor.
- Write another short program to display a short message (such as "hello world") on the LCD
- Write yet another short program to detect and count pulses from the measuring wheel.
- And one to control your motor using a relay.
When you have all the parts working separately it will be time to bring them together.
You should find examples and tutorials for the individual parts with the Arduino IDE and online.