The 5 model cars cost $20 x 5 = $<<20*5=100>>100.
The 5 bottles of paint cost $10 x 5 = $<<10*5=50>>50.
The 5 paint brushes cost $2 x 5 = $<<2*5=10>>10.
Thus, Marc spent $100 + $50 +$10 = $<<100+50+10=160>>160 in total.
#### 160