I use Halfords own oil filters, never had a problem.
I also run mine on the cheapest damn oil I can find, never had a problem.
Just change it regularly.
Toyota filters are not expensive. A tenner with with the sump plug drain washer.
Funnily enough just about all Toyota oil filters fit, they seem to be mostly the same, so you'll have no problem getting one.
Use a 10w-40. Something like Magnatec is fine really.