grass , turf or seed

what gives the best look turf or seed
i would like to seed as my garden is 37m by 10m and i think turf might be pricy and i have limited funds


and whats the best way to seed



(i have already rotavated and leveled) will have to go over it when the weather brakes tho

Depends how impatient you are.
Both will look the same after they're established. Turf is quick but dearer and more backbreaking , seed is cheaper but requires time.
Check at a suppliers about different grass types too. Some are more suited to ornamental lawns whilst other species are better at coping with the kids playing football on it and of course a mix can be tailored to suit you specfic needs.
If I'm remembering correctly there is an old saying about seeding which goes along the lines of "one for the birds, one to rot (or die) and one to grow" which is essentially saying sow more than you think to be sure. The last time I did a lawn I used seed and mixed it with sharp sand and raked it into a bed.

As said, seed is much cheaper, for a hard wearing surface, consider PRG, sow at 35g per square meter, leave it to establish, if coverage looks a little thin in some areas, overseed at a rate of 20g per square meter, buy a good grade of seed, not the rubbish that wilko's and that sell, also if there is a lot of shade in your garden, ensure that the seed is shade tolerant.