AMD FX-6350, MSI Radeon R9 270X, Cooler Master K280 - System Build - PCPartPicker United Kingdom
This PC is £431, it is more than good enough to run a large amounts of leagues on Football manager while maintaining a high game speed.
You would also be able to multi task heavily while playing Football Manager as its a 6 core CPU. Not as good as the 8350 build I did, but your budget is a little less now.
This build also as a R9 270X, which is a factory overclocked 7870, to put that in perspective the GPU is 25% more powerful than the PSU GPU, and CPU is far more powerful.
With that PC you could play current generation titles at 1080p and high settings, but you would get 60fps instead of 30fps that most ps4 titles have.
The RAM is holding that system back a little, had to put 4gb of RAM in instead of 8gb, however its an easy future upgrade if you wish.
If you want to buy a prebuilt system, this one is good and basically what mine started out as
AMD FX 8350 Eight Core 4Ghz 8GB 1TB HD3000 PC Desktop Computer | eBay
However there is no GPU, only the on board graphics which are not very good. You wouldn't play any modern games with this until you get a GPU in future.
However it would mince football manager.
If anyone is wondering why I'm recommending AMD CPU and not intel its because I'm assuming the TC wil play a lot of Football Manager, and the FX AMD CPU's are very good at processing Football Manager games, and multitasking.
Also they are cheaper and still more than enough for other games.