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're in, and residents of other Cornish Towns will often visit to shop with more variety. But, unless you're staying within walking distance of the centre, expect to either 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.
Trains from London Paddington - Plymouth - Truro, & Bristol - Plymouth - Truro
Truro is at the junction of the A39 and A390 arterial roads, some 14 miles north of Falmouth.
There is a good Park & Ride car park to the west of Truro, at Threemilestone, with frequent shuttle buses into the city centre which also call at the rail station. Parking in the city centre is expensive and limited, especially during the summer, although the largish Tesco's on the ring road allows a period of free parking - if you can find a space!
Royal Cornwall Museum, River Street, open Mo-Sa 10am-5pm, last admission 4.30pm, tel 01872 272205, free admission - includes the Courtney Library and exhibitions devoted to the history, culture and geography of Cornwall
Have High Tea at Charlotte's - In a Victorian building on the main shopping square in Truro, Charlotte's, on the second floor, is a step back in time. The tea is Cornish grown as well!!!.
Attend a performance at The Hall for Cornwall- a wide variety of music, theatre, and dance productions rotate through the Hall for Cornwall continually. Its a regular stop for National Theatre productions. In downtown Truro, the signs are easy to spot.
Watch a film at The Plaza - Courtesy of WTW Cinemas, opened in 1938 and now with four screens 
Good number of shops including a rather large Marks and Spencers.
Pippa's - Steakhouse, fantastic food at reasonable prices, child friendly and lovely atmosphere
Cornish pasty: bakeries include W.C. Rowe's on Victoria Square and Lemon Quay, Oggy Oggy on River Street, and Warrens on New Bridge Street and the cathedral square. W.C. Rowes is most popular.
the old ale house, just on the corner by the bus station is a great place to go for tradidtional ales and a quick game of pool
The A390 trunk road leads into St Austell
First Devon & Cornwall number 14 & 18 busses run up to every fifteen minutes (this is very good for anywhere in Cornwall, even central Truro); destinations include Truro Railway Station, Camborne, and Redruth, and can be caught at the bus station on Lemon Quay or Victoria Square.
Truro Railway Station is a short but hilly walk from the centre. Trains run hourly between Penzance and Plymouth with services to/from London every 2 hours.