i´m very much into cars and all of these are definately worth way more than a pound...even if their engine wasn´t even working. okay, the jaguar (1st one) is not so expensive to buy, atleast in germany, because, you got it, they are not the most beautiful, not the most technically advanced and not the most efficient, but still they are worth SOMETHING. so ask yourself, why would someone gift you something expensive for free?(1 pounds is nearly free lol) maybe it´s an auction-type offer and the starting price is 1 bucks... you can message them and ask why the price and condition of the car etc, but mostly likely this would be a scam attempt.

here in germany, you can get a working condition small car with road safety inspection done for low as 500 euro, IF YOU ARE LUCKY...
i don´t know the details of buying a car in UK, tho.
find someone to help you with that (parents,friends,friends parents,someone who works as a mechanic etc)

i know that feel, 10 years ago i was feeling exactly the same :(
well, cars do cost a ton of money, even the small ones. buying it, insuring it (maybe expensive for new drivers), servicing/repairing it ( huuuuge position on old cars most of the time) and then the things you have to buy regularly on ever car like gas,brakes,tires etc.

well, you gotta get that hustle going and get more money and save up for a nice car that you love and which won´t give up on you. It´s hard to find a car in good condition for a reasonable price.

Another thing on used cars: i personally (!) would try to avoid cars after the early 2000s, there are many types of cars from the 90s that have proven an incredible reliability over the past up to 3 decades, this may sound strange, but in this era of car manufacturing, they werent optimizing everything for maximum profit, in special the german and japanese ones. the goal was reliability, not 100 bucks more profit per car. on the other side, newer cars in general are way more safe, but they have more complicated technical and so more expensive stuff inside. more expensive shit that can break...

i also recommend to do a road safety course, before you are going to drive.
again, i can speak only for germany here, drivers license is a huge thing and takes quite a time to get here, but you only learn the very basics, which is enough if nothing happens, but there are so many dumbfucks on the road who put your life on danger everyday! i did these and i describe myself and did so before, as a confident and safe, even advanced driver. but in these courses you learn to react and handle your car in critical situations, eg when youre about to or have already lost the control of the car! driving school doesnt tell that to you most of the time. i know how people react when somthing happens they dont expect on the road. i know a girl who totally over reacted for what COULD HAVE BEEN some animal of the side of the road in the night while i was on her left side with my car (2-lane road), nearly rammed me off if i would not have slammed the the brakes at 100km/h + and many people are afraid to do that, because they don´t know how thier car will react. we both had a passenger at this time, 4 peoples life on the line for "some small eyes" she saw in the grass on the side of the road... people whill react poor on the streets and then it´s your turn to decide and react in a fraction of a second maybe.

i dont wann a get you afraid, just aware. you always have to know whats happening around you and react properly, also, your car needs to react properly, so it´s not a good advice to buy the cheapest you can get.

you also have to make a proper test drive or take someone with you, who knows how a car should react at certain things, like fast direction changes or emergency brakings. Safety tech your car SHOULD have: ABS,Airbags,ESP (in this particular order, and since i think youre in the uk: foglights ;). don´t be afraid to ask for more advice or even technical things