Spiderman 64 starts off exactly how you describe the game you remember. There is a tutorial, you stop a bank robbery, and then you have to save J Jonah Jameson by fighting Scorpion. Looked up some videos of the Scorpion fight, but it doesn’t look like he has a grab attack.

It was released on the Nintendo 64 in 2000. Not sure how different the ports are, but the game was ported to the PC in 2001, and to Mac in 2002.

Uhh… Depends on what is wrong with it. Is nothing happening when you try to turn it on, is it having trouble reading games, or does a controller port not work?

Some things can be pretty tricky, like if it needs a new laser in the disc reader. Whatever the case is, you should definitely start by popping the case open and to see if any capacitors are bulging/leaking/burst

You will definitely need a PC for PS3 and 360 emulation. The website for RPCS3 and Xenia should have the system requirements for the emulators that will be a good place to start.