Monterey Park is easily accessible by car and public transportation. The city has ample parking facilities in most of the tourist locations. You can also use a ridesharing service like Uber or Lyft to go around the city. The estimated travel time by car from Los Angeles to Monterey Park is around 20-30 minutes, and an Uber/Lyft may cost around $15-$20 each way.
If you have more time, you can explore other popular tourist attractions in Monterey Park, like the Sierra Vista Park, George Elder Park, or the Jardin del Encanto. You can also visit the nearby cities of Alhambra or San Gabriel for more shopping and dining options. However, if you have less time, you can skip the observatory or the farmers market, depending on your interests.