Still love my car but......

Best stuff loosening bolts is atf+acetone. Strong stuff use gloves and dont get on your eyes��

Good thing to change waterpump, timing chain, thermostat and fuel pump if you dont know how old those are.

Good welder like kemppi or walluis cost about 1000$ with argon/co2 bottle and good auto welding helmet.
0.8 mm wire is good for welding cars, can weld about 1-6mm thick steel.