2. No, taking the computer is actually a cover, just for entertainment.
3. Usually 12 days or so, the next day should not be military training.
4. The traffic is OK. Take bus no.83 to downtown. Although it is extremely crowded on weekends and holidays, it is quite difficult to find a seat. You can go to the train station.
Taking a taxi to the railway station is usually around 35 yuan, but it should have increased recently, because the starting price of Wuxi has risen to 10 yuan. Take bus No.26 and get off at Hekou, and walk for 7 or 8 minutes to RT Mart.