A similar question was asked 3 years ago for inner city transport cards, but this is for a different route, not using a transport card, and I am looking for more up to date answers.
I'm going to Lisbon next week and will be staying outside of the city in Algés. There are several buses and trains we can use to get into the city, but the sites I can find are unclear as to how to buy tickets.
Rome2Rio mentions buying tickets at the station, but others mention many stations don't have ticket counters. For buses I presume I can buy onboard. We would probably only go into the city 2 or 3 times, and walk whilst there so the transport card doesn't seem worth it.
As well as how to buy, how are these tickets used, are they one journey from A to B, do they have zones, do we scan them as we board etc.
So, where in Algés can we buy these tickets, and how are they used?