Hi and welcome:wave:
I can't say I know what a 140 cage is - unless its one of those plastic indoor cages that is 140cm long?
It is generally best to keep two rabbits together for company - one of each sex (neutered of course) although other combinations can work.
Rabbits need lots of space - for an outdoor set-up for 1 or 2 rabbits it is recommended that they have at least a 6' x 2' x 2' hutch with a permenantly attatched run - I would say 6' x 6' minimum. Many people find it more economical to use a shed or wendy house with a run attatched.
For indoor rabbits a dog crate, with extra levels added, can make a good base within a "bunny proofed" spare room where the buns can have freerange or with a large "playpen" attatched for safe play while they are alone (while you are out or in bed) along with supervised freerangetime in a larger "bunny proofed" area - say a kitchen/lounge or hall area.
Your cage may be suitable for a base but it would need to be within a larger area that the buns can have access to 24/7.
Because of the temperature differences I would say that during the Autumn and Winter it is not an option to have a rabbit indoors and take it out in the garden for time in a run. Indoor buns enjoy some time on the grass but this would have to wait until the spring at least.
Have you had a look at your local rescue for suitable buns needing homes? They come in every shape, size and colour and are usually neutered, vaccinated and often in happily bonded pairs so all the hard work is done for you. A rescue would also help with advising you on a suitable set-up.
Hope this helps!