Hi Rhoda, I wouldn't start out looking for a particular make but I would avoid models that are ex-fleet and cheapies such as Kia. I have seen someone abroad break into a Kia boot with just a screwdriver in less than 30 seconds, the panels are that weak.
As someone who has never been able to afford other than budget restricted cars, I've worked out a strategy over the years that works for me.
Prime consideration - go for low guaranteed mileage. No more than an average of 10000 miles per annum. This means the car must have a full service record, no gaps.
Preferably only one previous owner, no more than three.
No unusual, modified or high-spec cars. The more gadgets you have the more there are to go wrong (and in my experience they do).
Buy from a dealer if poss who will give you warranty. It's ok buying from an auction or an individual if you know how to fix the problems or have someone else who does.
Ask someone who knows what they are doing to look any prospective car before you buy it.
Going for low emission low tax is admirable but might also look at low fuel usage and service cost if you are on a budget. Ditto insurance, try to keep below a group 7.
Don't buy a car from a friend or relative unless you want to fall out with them.
Bear in mind in the present economic situation there are bargains out there but if it looks too good to be true it probably is.
Good luck