The 1.2 Panda will in many ways be similar to your old Punto. The engines have a good reputation for reliability provided they always have sufficient coolant. There could be some minor niggles, but this is (or should be) one of the cheapest cars you can buy, and should be judged accordingly. Unlike earlier 1.2's. post 2010 models have an interference engine, so make sure the cambelt is changed at the approriate point.
If I were in the market for a 2016 car, I'd consider paying a little extra and buying a new one; there are some good discounts to be had and you ought to be able to pick up a 1.2 easy for around £8200.
Personally I wouldn't want to own a TA once out of manufacturers warranty (and even then, I'd think twice).
Another good choice, similar in some ways to the Panda, is the Suzuki Swift. Totally lacking in Italian character, but also totally lacking in niggly Italian faults.
The quality of some of the parts used on the Panda show its cheapness. If you're planning to keep one for any length of time, the first things to do are to rustproof the sump and rear beam, dismantle and lubricate the front brakes and derust and paint the rear drums (yes, even on a brand new one, they will be well rusty). Hardly what most folks will want to do to a freshly delivered car, but then again, there are not many new cars that you can get freshly delivered for £8200.
In Pop form, they're even cheaper; expect to pay around £7600 for an unregistered one. A prereg should be even cheaper, but you won't have the same warranty and insurance protections (you won't get a new for old replacement if a prereg is written off in the first year, but you most likely will with a first owner car) or short term resale value.