In relation to taxes, that means:
if your income is 51,000, your net will be approx. 29,835 €/year (2,486 €/month)
if your income is 77,000, your net will be approx. 43,505 €/year (3,625 €/month)
if your income is 100,000, your net will be approx. 56,500 €/year (4,708 €/month)
VAT is 23%...
Auto fuel about 1,60 €/liter...
2 bedroom apartment in Lisbon about 750-1250 €/month (depending on location)...
Average meal about 15-25 €/person...