1. Nowadays old people would rather move to peacetul villages than live in noisy cities. (prefer)

=> Nowadays old people prefer to move to peacetul villages than live in noisy cities

2. She went on applying for the job she liked although she had little hope. (despite)

=> Despite having little hope, she went on applying for the job she liked.

3. He often gives the street children money and clothes. He is very generous. (It)

It is said that he is very generous to give the street children money and clothes. 

1. Nowadays old people prefer moving to peacetul villages than live in noisy cities. (prefer)

would rather + v-inf = prefer + to v-inf/ v-ing

2. despite having little hope, she went on applying for the job she liked 

Despite/In spite of Noun/Noun Phrase/V-ing, S + V + …

3.  it is very generous that he often gives the street children money and clothes.

it + tobe + adj + that + clause