The metro, bus and other public transport services are operated by the TMB (Transports Metropolitans de Barcelona).
TMB is the management unit of the companies Ferrocarril Metropolità de Barcelona, SA, and Transports de Barcelona, SA, operating the Bus and Metro network jointly on behalf of Àrea Metropolitana de Barcelona (AMB).
For more information you can find them at the following links:
Metro : All practical and updated information on the Barcelona metro service and lines.
Fun fact: The Barcelona metro has 8 lines, 158 stations and 150 trains run at peak times every working day, including the Funicular service. Each line is identified with a number after the letter L and a color.
Bus This section contains practical, updated information on Barcelona bus services.
General timetables for Metro, Bus and the Montjuïc Funicular.
For more information about the fares and available tickets click the following link: TMB Fares
The TMB has also a journey planner for when you are not sure which bus or metro you can take to arrive at your destination.
Bike services are managed by the company Bicing working jointly with Barcelona de Serveis Municipals, S.A.. Their website is only available in Spanish or Catalan but is not very hard to navigate.
Taking bikes and electrical bikes of Bicing is very easy. They have more than 450 bike stations across Barcelona. You will need to subscribe, which can be done online, Once you receive the subscriber card at home and have activated it, you can start using it. By simply taking a bike from any of the stations, use it during your journey and returning the bike at the station closest to your destination.
Get more information on the following links:
How to subscribe.
Pricing of the normal bikes and the electronic bikes.
Availability of stations and bikes.
Fun fact: Bicing has a co-operation with Drivy – Drivy lets you hire a car from among the thousands parked nearby, providing a simpler, quicker car rental service.
This is an interesting way to rent a car if you want to take a trip outside of Barcelona, for a day or a weekend for example.