You can't make an infinity lava source, but you can make something quite similar, which will get you more lava than you started with. I could have tried to explain, but I'll just show you a link to a YouTube video instead. The link is under "Sources and related links" below this answer.
Your next best bet though is every time you go to a place with lava bring all of the buckets you can and just bring them up to your house so that at least when ever you need some there just there, not unlimited but after a large time they add up
Diamonds are located near a natural lava source. Making your own lava source does not magically make diamonds appear.
Two ways.... 1. Water source block hits lava source block. 2. Place redstone on a block of dirt with water flowing right up against it but not over the redstone... then let lava flow onto the redstone.
look it up on minecraft wiki, it really depends of what light, whether it is fire, glowstone or lava.
yes you can use flint and steel or put lava under the ground
If you have a bucket, manually dig around underground until you find lava, then get reasonably close with your bucket and right click. Your bucket will fill with lava. Move back to your place, then rightclick on a block to place that lava. Be careful, as the lava you place will being flowing down. Also, lava burns close-by wooden things.
Diamonds are located near a natural lava source. Making your own lava source does not magically make diamonds appear.
You can't MAKE one, but you can collect lava with buckets.
you put the source block of water somewhere where it will run onto lava then it will form obsidian. you were asking about minecraft right?
Two ways.... 1. Water source block hits lava source block. 2. Place redstone on a block of dirt with water flowing right up against it but not over the redstone... then let lava flow onto the redstone.
Find a source of water and lava. Make some buckets and put water in them. Then go to your lava source and put the water in it. Just remember that it's dangerous to play with lava. You should always keep one bottle of water in case you start burning. Obsidian can only be mined with diamond pickaxes.
Lava or make a hole and they "fall" through it
look it up on minecraft wiki, it really depends of what light, whether it is fire, glowstone or lava.
no, it depends on the type of bridge
type /water or /lava
Obsidian always needs lava, either you make it with lava or water or find where the two have met naturally while underground. It cannot be crafted.
Water can be used to make traps, Hydrate fields, elevators, putting out lava and fires etc
yes you can use flint and steel or put lava under the ground