Truro is a small cathedral city (population 22,000) in the Duchy of Cornwall, of which it is the administrative capital.
The Cornish will insist this is a city. Anyone from outside of Cornwall will have visions of a built-up centre with a large conurbation and a good public transport system: don't. Truro is a practical city once you are in, and residents of other Cornish towns will often visit to shop with more variety.
However unless you're staying within walking distance of the centre, expect to drive in or have to plan a journey. There is a very small 'inner-city' area surrounding the centre. Even the most immediate 'suburbs' are small villages that have nothing but a few miles of field and a winding road separating them from the centre.
Great Western Railway runs trains from London Paddington via Reading. CrossCounty runs trains from Bristol, Cardiff, Birmingham, the north of England and Scotland. All trains stop at Exeter and Plymouth.
The station is about a 10-minute walk from the city centre.
Truro is at the junction of the A39 and A390 arterial roads, some 14 mi north of Falmouth. The A390 and A38 connect Truro to Plymouth and the south and south-east of Devon, while the A39 and A30 connect Truro to the rest of the country.
Coaches from various parts of the UK call at Truro; you may have to change at Plymouth, via a seriously grotty and unwelcoming bus station. Buses from Truro go to numerous Cornish towns and villages but can be infrequent. Most services end at the bus starion at Lemon Quay. However, for some unfathomable reason, the information office here is often closed.
Cornwall Airport Newquay (NQY) is a 30-40 minute drive away (car rental is available at the airport). A taxi fare from the airport to Truro costs about £52.00.
To get from the airport to Truro by bus, take the A5  from the airport to Newquay town centre. Buses 93, 90, 87 and 85 run from Newquay to Truro, with most services ending at the bus station. The full journey normally takes around 1 1/2 hours. Be sure to check which stop to change at in Newquay in order to avoid missing your connection.
Most attractions are within walking distance. However, there are buses in Lemon Quay. Check timetables, as service can be patchy.
There is a good number of shops, including a rather large Marks and Spencers.
There are two covered markets. One leads off the Piazza with several small traditional stalls. The other leads off Lemon St (near the cinema): the little shops here would appeal more to the eco/organic minded, with a pleasant coffee shop and art gallery upstairs, where you can usually find a seat.
On Saturday mornings, a great farmers' market on the piazza has good local produce, including delicious Cornish ducks, cheeses, bread, rose veal and plants to take home. Wednesday's market, in the same place, is smaller.
Other than a few theft and car-break-ins crime is non-existent here.
The surrounding area of Cornwall and Devon (especially Truro) are very religiously conservative and see homosexuality as a sin. You will face discrimination since all public accommodations are not LGBT friendly. Also, you could face attacks and police will be complicit or unsympathetic. LGBT should keep their sexuality private.