Good Morning Tamaris, to start, make sure you get the best price for your old Fiat around £150 should be about right, regards your purchase of a 2nd hand car, do yourself a favour! if you see one you fancy, for your own safety even if it costs you £30 to get someone to check it for you, get some one that knows a bit about cars, £1000 / £2000 does not get you lot today believe me, do not bye from the side of the road as there is no Come Back after the Purchase, look around a dealer's garage & ask about their Trade in's, at times you can pick up a good one but again "It may be" bought as seen that way there is no COME BACK on the garage, I wish you well with your search but do not rush the purchase, I heard too many
people say " I wish I would have waited ( Don't be one of them.)